We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the average time is 68 minutes with a standard deviation of 12 minutes. We want our 90 percent confidence interval to have a margin of error of no more than plus or minus 1 minutes. What is the smallest sample size that we should consider

Answers

Answer 1

Answer: The smallest sample size would be 392.

Explanation:

Since we have given that

Standard deviation = 12 minutes

Mean = 68 minutes

Margin of error = [tex]\pm 1[/tex]

At 90% confidence interval, z = 1.65

So, the smallest sample size that we should consider would be

[tex]n=(\dfrac{z\times \sigma}{ME})^2\\\\n=(\dfrac{1.65\times 12}{1})^2\\\\n=(19.8)^2\\\\n=392.04\\\\n=392[/tex]

Hence, the smallest sample size would be 392.

Answer 2
Answer:392

Explanation:

Related Questions

The final stage of the grieving process is __________, which provides __________.

Answers

Answer:

The final stage of the grieving process is Acceptance, which provides the ability to move forward in life.

Explanation:

The final stage of the grieving process is anger, which provides an outlet to vent.

Hamadi is renting a car. The rental charge is $17.50 per day plus $0.16 per mile. Hamadi can
spend at most $33 for the cost of the car rental. If Hamadi rents the car for one day, which of
the following is one possible number of miles Hamadi can drive the rental car?​

Answers

Answer:

96 full miles.

Explanation:

[tex]33=17.50+0.16m\\0.16m=15.5\\m=\frac{15.5}{0.16}\\m=96.875[/tex]

Select the correct answer. For which career role would a distance education course be useful? A. screenwriter B. authoring specialist C. journalist D. copy writer




Answers

Answer:

B. author specialist

Explanation:

B

B would be the correct answer

What does body language not improve

Answers

Answer:

success

Explanation:

you body allows you to see and tou can also listen and understand but success does not include your body

body language improve success

The descriptive language in the poem helps the reader understand
A. the way the narrator feels about splendor.
B. the purpose of telling time with tree rings.
C. the narrator’s relationship with the cane.

Answers

Descriptive language in a poem is language that paints a vivid and sensory picture of a person, place, thing, or idea. It uses words and phrases to create an image in the reader's mind, appealing to the senses of sight, sound, smell, taste, and touch, and conveying emotions and experiences.

Explain the given options about descriptive language in detail?

Based on the options given, descriptive language in a poem can help the reader understand:

A. The way the narrator feels about splendor: Descriptive language can convey the beauty, grandeur, and magnificence of the subject being described. Through vivid and sensory language, the reader can feel the emotions and experiences the narrator is describing.

B. The purpose of telling time with tree rings: Descriptive language can explain the details of the natural world and scientific processes. Through precise and specific language, the reader can understand the purpose and significance of telling time with tree rings.

C. The narrator’s relationship with the cane: Descriptive language can convey the emotional and symbolic meaning of objects. By using figurative language and personification, the reader can understand the deeper connection and significance of the narrator's relationship with the cane.

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The answer is B (the purpose of telling time with tree rings.)

Which type of character does Peepi-geewi-zains represent in the passage?
A.
a brave warrior
B.
an inexperienced youth
C.
an untrustworthy friend
D.
a wise mentor

Answers

I think A. An inexperienced youth
I am not sure about my answer but i think think the answer will be a A

The mean ACT composite score in a recent year is 20.8 with a standard deviation of 5.6. A random sample of 36 ACT composite scores are selected. What is the probability that the mean score for the sample is (a) less than 21.6

Answers

Answer:

0.3051

Explanation:

mean (μ) = 20.8, standard deviation (σ) = 5.6 and the number of samples (n) = 36 scores.

Z score also known as standard score is used in probability to measure the number of standard deviations by which the value of what is being measured is above or below the mean. It is given by the equation:

Z score (z) = [tex]\frac{x-\mu}{\frac{\sigma}{\sqrt{n} } }[/tex]

For x = 21.6,

[tex]z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n} } } =\frac{21.6-20.8}{\frac{5.6}{\sqrt{36} } } =0.86[/tex]

From the probability table:

P(x < 21.6) = P(z < 0.86) = 0.3051 = 30.51%

The probability that the mean score for the sample is less than 21.6 = 30.51%

Was pop music new in London in 1965?

Answers

Answer I dont live in london

Explanation:

The Beatles and the Rolling Stones were

Which word(s) are associated with the illustration? A) legend B) caption C) definition D) call number

Answers

Answer:

I belive its definition

The answer would be c : Definition

The quality-control manager at a compact fluorescent light bulb factory need to determine whether the mean life of a large shipment of bulbs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 bulbs indicates a sample mean life of 7,250 hours. 1. Set the hypothesis, for matching this statement "Is there evidence that the mean life is difference from 7,500 hours?" 2. At 95% confidence, what is the estimation of population mean life of the bulbs? 3. Compute p-value. 4. Find the solution, by using level of significance = 0.05

Answers

Complete Question:

The mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicate a sample life of 7,250  hours.

1. State the Null and Alternative Hypothesis.

2. At the 0.05 level of significance, is there evidence that mean life is different from 7,500 hours.

3. Construct a 95% confidence interval estimate of the population mean life of the CFLs.

4. Compute the p-value and interpret its meaning.

Answer:

-2, (7005, 7450), 0.045

Explanation:

1).

H₀: mean of life shipment is 7500 hours

the hypothesis are outlined as follows

H₀: [tex]\mu =[/tex] 7500

H₁: [tex]\mu \neq[/tex] 7500

where, n = 64, x = 7250, [tex]\sigma =[/tex]1000 hours

Test statistics:

[tex]Z = \frac{7250-7500}{\frac{1000}{\sqrt{64}} } \\\\Z = -2[/tex]

Our conclusion from the above result is that there is sufficient evidence to say that the mean life is different from 7500 hours

2). 95% confidence Interval for the population mean [tex]\mu[/tex] is

[tex][7250-1.96\times \frac{1000}{\sqrt{64}},7250+1.96\times \frac{1000}{\sqrt{64}} ]\\\\(7005,7495)[/tex]

3).

the p-value is given by

[tex]p-value =2P(Z\leq -|z|)\\\\p-value =2P(Z\leq -|2|)\\\\p-value = 0.0455[/tex]

Earth's weather takes place in what layer of the atmosphere?
A) exosphere
B) lithosphere
C) stratosphere
D) troposphere

Answers

D) Troposphere the troposphere is the first layer above the surface and contains half of the Earth's atmosphere. Weather occurs in this layer. 2) Many jet aircrafts fly in the stratosphere because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun.

Strategic Searching-

Look for two words at once by placing OR between them.

Group of answer choices

True

False

Answers

The statement is False.

Explanation:

The term strategic searching is not simply looking for two words at the same time and placing the use of the word Or between them. These are the strategies which are used to find words or the meaning of the concepts which one is looking for.

It does not only mean looking for two words at the same time. It is much more than simply stating that of searching the meaning of the two words with the help of word Or.

This statement is false

provide your thoughts on spanking your children as a form of punishment?

Answers

In my opinion spanking a child to tell them thats not the right thing to do or if they did something bad isn’t the proper way they should be taught not to do things. I think children she be talked to insteak of receiving spanking because the child might be scared to be near their parents thinking they are going to get hit again.
Spanking is a widely debated topic. Although most experts advise against corporal punishment, many parents still report spanking is an effective discipline strategy. Before you decide if it's OK to spank your child, examine the potential consequences of physical punishments.

Reasons Parents Spank
Sometimes parents spank their children out of desperation. When kids frequently misbehave, parents may feel they are at the end of their rope and aren’t sure what else to do. Often they will say, “Nothing else seems to work.” Without a consistent discipline strategy, it may feel like spanking is the best option. Another common reason parents spank is out of exasperation. A parent who thinks, "I can't believe you just did that!" may spank a child without thinking. Instead, they react out of anger or fear. Without a clear plan in place for discipline, spanking may become the first line of defense.

The Problems With Spanking

Spanking a child can create even more problems than it cures. Here are a few reasons you may want to rethink spanking your child:

Spanking doesn’t teach kids how to behave appropriately. A child who gets spanked for arguing with his brother won't learn how to get along better in the future. Effective discipline should teach new skills1.
Spanking models aggression. Children do what parents do, more than what they say. So if you spank your child for hitting his brother, you'll send a confusing message.2
Children who are spanked often feel shame. They may think, "I'm bad," and may struggle with self-esteem issues. Children who experience shame aren't motivated to improve their behavior.2
Spanking shifts a child's focus from their behavior to their parent's behavior. They may spend their time focusing on how they are angry at their parent rather than on what they could do better next time. Kids then begin to make decisions based on thinking “What can I do that won’t get me a spanking” versus “What’s the best choice I can make right now.”
Spanking loses effectiveness over time. Sometimes kids decide the misbehavior is “worth it.” A more effective discipline strategy, such as taking away electronics for 24 hours, can be much more effective in motivating kids to behave.
Spanking isn't an option as children grow older. If you have always used spanking to discipline your child, what will you do when he is 16? There are plenty of age-appropriate discipline strategies that you can use as an alternative to spanking throughout your child’s life.
Alternatives to Spanking
There are many discipline strategies that are more effective than spanking. 1 Consider alternative negative consequences that will teach your child new skills.

If your child colors on the walls, a logical consequence would be to have him wash the walls. This teaches him to have more respect for property.

Restitution helps restore relationships and helps children learn new skills as well. It can be very effective for aggressive behavior and works well for children and teens of all ages.

The goal of discipline should be to teach your child new skills so your child can grow up with the tools necessary to be a responsible adult.1

The goal of discipline should be to teach your child new skills so your child can grow up with the tools necessary to be a responsible adult.1
So when determining which discipline strategies to use, think about what you hope your child will gain from your intervention.

Which type of character does Peepi-geewi-zains represent in the passage?

Answers

Answer: PAMBU

Explanation: THAMBU

The authors imply that the response of various officials to attempts to
measure their countries' carbon stock through field surveys has been
unhelpful, because they fear that jobs for their
countries' scientists will be lost.
helpful, because their countries have invested
significantly in technology to allow studies to
expand.
helpful, because their countries stand to benefit
from universal carbon data that the studies will
uncover
uncover.
unhelpful, because they do not make their
countries' land holdings readily available for study.​

Answers

Answer:

because they do not make their countries' landholdings readily available for study.

Explanation:

The passage referred to here is shown in attachment

The authors imply that the response of various officials because they do not make their countries' landholdings readily available for study.

What is the authors  words?

The statement suggests that the authors of a certain text or study believe that officials are uncooperative or unhelpful in allowing access to their countries' land holdings for the purpose of conducting studies.

This could be hindering efforts to measure carbon stock through field surveys due to restricted access to the necessary areas. The implication is that the lack of access to land holdings is a key factor contributing to the unhelpful response of these officials.

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(
Which statement represents what a person with a Growth Mindset believes?
A: I'm just never going to be good at some activities.

B: If I'm not smart, there's nothing I can do about it.

C: I can improve any of my abilities with practice.

D: Making a mistake means I'm stupid and bad at everything.

Answers

I can improve any of my abilities with a practice statement that represents what a person with a Growth Mindset believes. Thus, option C is correct.

What is a Growth Mindset?

Those with a growth mindset think they can get smarter and more talented by working hard and doing things. A growth mindset permits folks to "bounce back" by putting out more motivating effort and acknowledges that failures are an essential part of what we learn.

People can value their work despite what happens thanks to the growing attitude. The idea that you were born with a particular thinking and it can change is known as a specific mindset. This will represent the way that the person will be performing the activity and will be working to achieve it.

Therefore, option C is the correct option.

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number each material and sort the items in order from lowest (1) to highest (7) Density

- chalk

- copper

- flour

- dry beans

- talcum powder

- wax

- wet sand

Answers

Answer: copper > chalk > flour > talcum powder > dry beans.

Explanation:

Density is the compactness of given object.

Basically, it is mass per volume.

copper has the most density

chalk has lesser density than copper.

flour has lesser density than copper and chalk.

talcum powder has lesser density than copper, chalk and flour.

dry beans have lesser density than copper, chalk, and flour.

So, it becomes,

copper > chalk > flour > talcum powder > dry beans.

Yea I don’t get this but hope you get someone to answer it :)

A head positioned forward facing someone indicates

Answers

Answer:

Facing someonedirectly indicates interest. It is a positive signal. Tilted down: Tilting the head down signals disapproval......interest

I think it’s interest
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