The mean of people in the sample of households of 7th-grade students is 4.3. The mean of people in the sample of households for 8th-grade students is 4.5. What might Principal Coleman infer or predict about the entire population based on the data?

Answers

Answer 1

Arithmetic mean is used to describe the sum of values in a dataset divided by the number of values. It s the average of a given dataset which gives us an idea about the average value in a data set. That said, a mean of 4.3 means in the household sample (the average number of students in the data set falls within probably 4 and 4.7 probably). On the other hand,.a mean of 4.5 means there are more 8th graders than 7th graders. An increase of 0.2 from the 4.3 shows that the number of 8th graders slightly surpasses 7th graders. The principal can predict that there are more students in 8th grade because they have a higher average.

Answer 2

Answer:

The mean of something is the "average"

For example, if the mean of people in the households of 7th-grade students is 4.3, this means that if you go to a random house of a 7th-grade student, you can expect around 4 people in there.

Now, for the 7th-grade students, the mean is 4.5, just a 0.2 bigger. (This means that, on average, there is more people in the 8th-grade student's households)

So Principal Coleman can infer that the amount of people in the households of 7th-grade students and 8th-grade students is almost the same, wherein the 8th-grade students there is a small chance of finding more people, but this difference is almost depreciable.

Related Questions

ethan took a quiz with 15 questions. if he answered 3/5 of the questions correctly, how many did he get wrong?

Answers

[tex] \frac{15}{1} * \frac{3}{5} = \frac{45}{5} = 9 [/tex]

15-9= 6
Ethan got six questions wrong.

I love this question! It requires careful reading! There are multiple ways to get the right answer, so here are a couple! The sentence tells us the fraction of the questions he got RIGHT! To find this out you must multiply 3/5 by the total number of questions (3/5 x 15 = 9 correct questions). You then can subtract the 9 questions from the 15 total to find out the number that were INCORRECT/WRONG. 15 - 9 = 6 incorrect questions. Another strategy would be to find the fraction of questions Ethan missed, which is one minus the fraction he got RIGHT. 1 - 3/5 or 3/5 + ___ = 1 (5/5). He missed 2/5 of the questions, so you can multiply 2/5 by the total to get (2/5 x 15 = 6) 6 incorrect answers. Hope this helps!

A rectangular prism has a width of 5 cm a height of 8cm and a depth of 5cm. What is the volume of the prism

Answers

The formula for the volume of a rectangular prism is...

v=l*w*h (note that depth can be substituted in this case for length)
plug in the data we know
v=5*5*8
v=200cm³

Answer=200cm³

Which graph shows the complex number i-1

Answers

The appropriate choice is Graph B. It would be even more appropriate if the axes were labeled as real and imaginary (i).

"i" is 1 unit in the +y direction. "-1" is 1 unit in the -x direction, placing the point in the 2nd quadrant.

HELP PLEASE! −3.64⋅|−5.3|−1.53 what is the anwser?

Answers

The expression simplifies to approximately -20.822. It involves multiplying -3.64 by the absolute value of -5.3 and then subtracting 1.53 from the result.

To calculate this expression, follow the order of operations (PEMDAS),

which stands for Parentheses, Exponents, Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right).

In expression, there are no parentheses or exponents, so we proceed with multiplication and then subtraction:

-3.64 × |-5.3| - 1.53

Calculate the absolute value of -5.3, which is 5.3.

Multiply -3.64 by 5.3.

Finally, subtract 1.53 from the result.

-3.64 × 5.3 - 1.53

Now, do the multiplication:

-19.292 - 1.53

Now, subtract:

-19.292 - 1.53 = -20.822

Therefore, the answer for the given expression -3.64 × |-5.3| - 1.53 is approximately -20.822.

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Which of the following are examples of exponential decay?

Answers

decreasing in quantity according to the law is the definition of exponential decay. but what are the choices you can chose from?

The interior angles of a triangle have measures (2x−5)° , (4x−1)° , and 30°. What is the value of x? Enter your answer in the box.

Answers

we know that

the sum of the internal angles of a triangle is 180 degrees
so
(2x-5)+(4x-1)+30=180
6x+24=180
6x=156
x=26°

the answer is
x=26°

what is the length of DE?

Answers

The length of DE would be 18

Hello! It is D. :) I believe 22 is the answer.

Please help this doesnt really make sense. If you want to see the paper just press that pic right up there

Answers

Numerator , denominator, mixed fractions, proper fractions

The price of a ticket was increase from 50p to 60p. What is the increase a as a fraction in its simple form? As a percentage of the original price?

Answers

10p or 20% was added on

Given is the price increase of a ticket from 50p to 60p.

Using the concept of fractions, we can find the ratio of new price to old price as follows :-

[tex] \frac{new \;\; price}{old \;\; price} = \frac{60p}{50p} =\frac{6}{5} [/tex]

So the increase in price is [tex] \frac{6}{5} [/tex] times old price of the ticket.

Using the formula of percentage, we can find the percentage change in price as follows :-

[tex] Percentage = \frac{(new\;\;price \;-\; old\;\;price) }{old \;\; price}*100 \\\\
Percentage = \frac{60p-50p}{50p}*100 \\\\
Percentage = \frac{10p}{50p}*100 \\\\
Percentage = 20\;\% [/tex]

Hence, Percentage increase is 20% of the original price.

PPPPLLLLZZZZZ I BEG UUUU

Factor the polynomial: x^2–xy+x–xy^2+y^3–y^2

Answers

Write expression as
x^2–xy+x –(xy^2-y^3+y^2)
Then take out common factors in each group
=x(x-y+1) -y^2(x-y+1)
Take out the common factor (x-y+1)
=(x-y+1)(x-y^2) voilà!

What is the area of the shaded region?

Area = ____ ft2

Answers

the answer will be Area= 30ft2 all you had to do was add all the sideds

So the seeing this you would subtract the 2 ft from the 7 ft, and the extra 1 ft from 6 ft. So the shaded region would be 5ft by 5ft. Now we just need to multiply it to get the area which would be 25 ft squared. I hope this helps :)

Can you answer these questions for me plz I need them before Monday ty

Answers

A. The answer is 4y+3 you distribute and get 4y^2 +4y+1-4y^2+2 then combine like terms which is (4y^2-4y^2)+(4y)+ (1+2) and equals 4y+3

B. The answer is 14w^3 +2w^2 bc you distribute again which gives you 20w-10w^2-6w^3+12w^2 and then combine like terms (20w^3-6w^3)+(-10w^2+12w^2) and equals to 14w^3+2w^2

C. The answer is 3y^2-5y+2 bc you distribute again which is 7y^2-3y-4y^2-2y+2 and then combine like terms (7y^2-4y^2)+(-3y-2y) +2 and gives you 3y^2-5y+2

Write the equation of the plane with normal vector n = 1, 3, 4 passing through the point (4, −1, 3) in the scalar form ax + by + cz =
d.

Answers

Try, pls, this solution (see the attachment).

The equation of plane with normal vector n = (1, 3, 4) passing through the point (4, −1, 3) in the scalar form is;

⇒ x + 3y + 4z = 13

What is Equation of plane?

A equation of plane containing the point (x₁ , y₁ , z₁) and having a normal vector (a, b, c) is defined as;

⇒ a (x - x₁) + b (y - y₁) + c (z - z₁) = 0

Given that;

The normal vector n = (1, 3, 4)

And, The point = (4, −1, 3)

Now,

Since, we know that;

A equation of plane containing the point (x₁ , y₁ , z₁) and having a normal vector (a, b, c) is defined as;

⇒ a (x - x₁) + b (y - y₁) + c (z - z₁) = 0

So, We get;

A equation of plane containing the point (4, −1, 3) and having a normal vector (1, 3, 4) is defined as;

⇒ a (x - x₁) + b (y - y₁) + c (z - z₁) = 0

⇒ 1 (x - 4) + 3 (y - (-1)) + 4 (z - 3) = 0

⇒ x - 4 + 3y + 3 + 4z - 12 = 0

⇒ x + 3y + 4z = 13

Thus, The equation of plane with normal vector n = (1, 3, 4) passing through the point (4, −1, 3) in the scalar form is;

⇒ x + 3y + 4z = 13

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Find the surface area of the composite solid and round to the nearest tenth. Explain your answer.

Answers

well, notice the composite is really just 4 triangles atop sitting on top of 4 rectangles, and all of them area stacked up at the edges.

so, for the rectangle's sides,

front and back are two 6x3 rectangles

left and right are two 6x3 rectangles

the bottom part is a 6x6 rectangle

now, we don't include the 6x6 rectangle that's touching the triangles, because that's inside area, and is not SURFACE area, so we nevermind that one.

now, the triangles are just four triangles with a base of 6, and a height of 4, in red noted there.

so, just get the area of all those rectangles and the triangles, sum them up and that's the surface area of the composite,

[tex]\bf \stackrel{lateral~rectangles}{4(6\cdot 3)}~~+~~\stackrel{bottom~rectangle}{(6\cdot 6)}~~+~~\stackrel{triangles}{4\left( \cfrac{1}{2}(6)(4) \right)}[/tex]

Tina was involved in an accident in which she rear-ended another driver stopped at a stoplight. Tina is fully insured through her insurance company. Which of the following components of her insurance policy will cover the damages caused to Tina’s car in the accident?
a.
bodily injury
b.
property damage
c.
collision
d.
comprehensive damage

(Correct Answer Is C. Collision)

Answers

You're right. It is collision. If there is something like spinal damage to the person you hit, then it becomes an entirely different ball game. Then A is the right answer. You need both of them. The most obvious answer is C. That kicks in no matter what else may be true. But back and neck injuries are often part of the claim.

Answer:the answer is C. collision

Step-by-step explanation:

PLEASE HELP!!!!
Different types of parallelograms have distinguishing traits. Compare and contrast the rectangle, rhombus, and square based upon the characteristics of their angles. Which one(s) have angles whose sum is 360 degrees? Which one(s) have both pairs of opposite angles that are congruent? Which one(s) have four angles?

Answers

This seems to be more of a middle-school-level of a geometry question vs college level.

Either way, what you're doing here is comparing 3 shapes. The square, rectangle, and rhombus. You should definitely know what a square and rectangle look like, but in case you don't know the rhombus, it's the shape that's usually allocated with diamonds, on a 2D plane.

All of these shapes are considered parallelograms. They all have similar features and characteristics, but only to some extent.

Square=Four sides, four 90 degree angles, 2 pairs of opposite congruent angles (meaning all angles are congruent in this case), sum of 360 degrees (90*4)

Rectangle=Four sides, four 90 degree angles, 2 pairs of opposite congruent angles (meaning all angles are congruent in this case), sum of 360 degrees (90*4)

Rhombus= Four sides, Four angles in total measuring up to 360 degrees, 2 acute angles (congruent; less than 90), two obtuse angles (congruent; more than 90). Angle measurements can fluctuate within the 2 acute-2 obtuse parameters. 2 pairs of opposite congruent angles, however, these are not all congruent with each other, unlike the previous two.

All 3 sum to 360 degrees
All 3 have both pairs of opposite angles congruent
All 3 have 4 angles.

~Hope this helps!

The square, rectangle, and rhombus are all considered parallelograms. Squares have four sides, four 90 degree angles, 2 pairs of opposite congruent angles (all the angles are congruent), the angles add up to a sum of 360 degrees. Rectangles have four sides, four 90 degree angles that add up to 360 degrees, 2 pairs of opposite congruent angles (all the angles are congruent). Rhombuses have four sides, four angles in total measuring up to 360 degrees no matter the combination of angles because the oposite angles are congruent (2 acute angles and two obtuse angles).

While the rhombus is the only shape within this trio to have a pair of congruent acute and a pair of congruent obtuse angles the square and rectangle both have 4 congruent angles. All 3 shapes have a sum of 360 degrees when the angles are added together, all 3 have pairs of opposite angles being congruent, and all 3 shapes have 4 angles in total.

a proportional relationship must graph as a line, is that false?

Answers

a direct proportional relation, could be linear, like y = 3x, in which case you get a line, however it could also be exponential or even logarithmic or radical, in which cases, you do not get a line, but just a sinusoid graph.

y = 3x² <--- parabolic graph

y = 3√x <--- parabolic as well

I need help for number 13-16 and I also need an explanation please help

Answers

For the first three you need to find volume, so the formula for volume is b*w*h. base*width*hight. so multiply all three numbers together and you will find your answer.

In question 13 you must find the volume of the prism in 1/6 in. There are 13 1/6in in 2 1/6in, 7 1/6in in 1 1/6in, and 6 in 1in, so you multiply 13 * 7 * 6 = 546

Find the volume in Q14, 4 2/5 * 3 1/2 * 2 1/4

Convert

[tex] \frac{12}{5} [/tex] * [tex] \frac{7}{2} [/tex] * [tex] \frac{9}{4} [/tex] = 18.9

The answers on the third one are A, C, and F

The answers on the fourth one are B, D, and E

 Hopefully it helps!!

The sum of the perimeters of two congruent triangles is three times the perimeter of the first triangle. Always Sometimes Never

Answers

The sum of the perimeters of two congruent triangles is TWO times the perimeter of one of them.

hope it helps

A car traveling at 46 mi/h slows to a speed of 23 mi/h in 5 seconds. It maintains that speed for 5 seconds and then slows to a stop after 5 more seconds. Which graph shows the car’s speed over time?

Answers

For this case, the first thing you have to keep in mind is that we are in the presence of a piece function.
We have then:
For [0, 5]:
A car traveling at 46 mi / h slows to a speed of 23 mi / h in 5 seconds.
For [5, 10]:
It maintains that speed for 5 seconds.
For [10, 15]:
then slows to a stop after 5 more seconds.
In this case:
x axis: represents time
y axis: represents the speed.
Answer:
See attached image for the graphic v (t) vs t.

Which is the graph of f(x) = 0.5(4)x?

Answers

its the first option

Answer:

The first graph, so A is the answer

Step-by-step explanation:

A Family spends 240.00 per week on food. If this is 16% of their income, what is the families weekly income?

*show work*

Answers

Answer: The family's weekly income is $1500

-------------------------------------------

Work Shown:

x = weekly income (in dollars)

16% of x = amount spent on food per week
16% of x = 240
(16/100)*x = 240
0.16*x = 240
0.16*x/0.16 = 240/0.16
x = 1500

The family's weekly income is $1500.

What is percentage?

A percentage is a number or ratio that can be expressed as a fraction of 100. A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%", although the abbreviations "pct.", "pct" and sometimes "pc" are also used. A percentage is a dimensionless number; it has no unit of measurement.

here, we have,

given that,

A Family spends 240.00 per week on food. If this is 16% of their income.

let,

x = weekly income (in dollars)

16% of x = amount spent on food per week

16% of x = 240

(16/100)*x = 240

0.16*x = 240

0.16*x/0.16 = 240/0.16

x = 1500

Hence, The family's weekly income is $1500.

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Is 2 yards greater less than equivalent to 5 ft

Answers

Hi there.

3 feet = 1 yard;
2 yards = 6 ft; therefore, 2 yards is greater than 5 ft.

I hope this helps!

A rectangle is 2/5 inches long and 1/3 inches wide what is the area of the rectangle

Answers

2/5 x 1/3 = 2/15 square inches

To find the area we do length times width. The easy thing with fractions is that you can just multiply across.

So 2/5 times 1/3.

2 x 1 = 2
5 x 3 =15

2/5 x 1/3 = 2/15.

Your answer is 2/15

~Deceptiøn

Consider the numbers 4/15 and 3/10 (a) Compare the numbers. (B) find a fraction between the two given numbers

Answers

As a decimal 4/15 = 0.2666667
As a decimal 3/10 = 0.3 [talk about close]
3/10 is bigger.

You could take an average to find something between 4/15 and 3/10
1/2(4/15 + 2/10)
1/2(8/30 + 6/30)
1/2(14/30)
1/2(7/15)
7/30 is between the two given numbers..

This circle is centered at the origin, and the length of its radius is 10. what is the circle's equation?

Answers

The equation of the circle that you are looking for is x^2 + y^2 = 100.

You can find this by using the base formula for a circle:

(x - x1)^2 + (y - y1)^2 = r^2

In which x1 is the x-coordinate of the origin, y1 is the y-coordinate of the origin, and r is the radius. So we put in the values we know and simplify.

(x -0)^2 + (y - 0)^2 = 10^2

x^2 + y^2 = 100

The equation of a circle centered at the origin such that the length of its radius is 10 units will be x² + y² = 100.

What is a circle?

Circle is a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).

Given is a circle is centered at the origin, and the length of its radius is 10 units.

The equation of the circle whose center is at origin is given by -

x² + y² = r²

We have radius [r] = 10 units

Therefore, we can write the equation of the circle as -

x² + y² = 10 x 10

x² + y² = 100

Therefore, the equation of a circle centered at the origin such that the length of its radius is 10 units will be x² + y² = 100.

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Which expression is equivalent to 3i(4 + 7i)?

Answers

3i(4+7i)=3i*4+21i^2=12i-21 (i^2=-1)

the answer is 3i(4)+21i

I hope this helps

Find the value of t in the equation t + 5 + 3t = 1. A. 1.5 B. 6 C. 3 D. –1

Answers

Answer:

D. -1

Step-by-step explanation:

All the variable terms are on the left, so subtract the constant on the left (5) from the equation and collect terms.

... 4t = -4 . . . . . . . variable term on one side; constant term on the other

Divide by the coefficient of t.

... t = -1

A high school gym class was jumping rope. They wanted to know how many jumps each student could make before they missed. The results are listed below. 2 5 6 7 9 11 12 14 14 15 17 19 21 22 23 24 27 32 35 39 39 44 47 53 60 61 82 85 88 90 93 96 101 103 114 125 What is the median number of jumps that the students made before missing? a. 32.5 c. 33.5 b. 33 d. 34

Answers

There are 36 people. The number is even, so your answer will not be one of the results. 36/2=18. The 18 and 19 values are 32 and 35.(32+35)/2=33.5. The answer is c).

The median number of jumps that the student made before missing is calculated as: C. 33.5.

What is the Median of a Data Set?

Median is the middle value or the average of the two center values of a data set.

Given the data set:

2, 5, 6, 7, 9, 11, 12, 14, 14, 15, 17, 19, 21, 22, 23, 24, 27, 32, 35, 39, 39, 44, 47, 53, 60, 61, 82, 85, 88, 90, 93, 96, 101, 103, 114, 125

The average of the two center values is: (32+35)/2 = 33.5

Therefore, the median number of jumps is: C. 33.5.

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The exchange rate of U.S. dollars to British pounds (£) .63. You have $4000 to convert to British pounds. How many british pounds will you receive?

A) £3937
B) £6349
C) 4063
D) 2520
With an explanation please bc my answer that I got isn't on here

Answers

Hello there,

In the statement above, one U.S dollar would be 0.63 British pounds. Therefore, $4000*0.63=2520.

Sorry for being so late I suck :(

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