Question

UVA wants to estimate the average number of hours students spend studying on campus each week....

UVA wants to estimate the average number of hours students spend studying on campus each week. They sample 54 students. This sample showed an average of 15.4 hours per week with a standard deviation for the sample of 9.2 hours. They want a 90% confidence interval

a) what is the 90% confidence interval? (give the interval, 3 decimal places)

b) what is the margin of error? (give the interval, 3 decimal places)

c) write a sentence summarizing the meaning of the confidence interval in terms of the true mean number of hours UVA students spend studying per week.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

C)the meaning of the confidence interval- the true mean number of hours UVA students spend studying per week has a 90% chance of being between 13.34 and 17.459

************************************************************************************************************************************

Hi!

If you like the solution, please hit the thumbs up/Like button as your feedback!
Cheers!
************************************************************************************************************************************

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You want to estimate the average time college students spend studying per week. You know that...
You want to estimate the average time college students spend studying per week. You know that the population standard deviation for studying time per week for college students is 3.5 hours. You want a 99% confidence interval with a margin of error of 30 minutes (0.50 hours). How many students do you need in your study? Group of answer choices 188.24 students 325 students 324.9 students 189 students
A professor wants to estimate how many hours per week students study. A simple random sample...
A professor wants to estimate how many hours per week students study. A simple random sample of 78 students had a mean of 15.0 hours of studying per week. Construct and interpret a 90% confidence interval for the mean number of hours a student studies per week. Assume the population standard deviation is known to be 2.3 hours per week
A professor at a university wants to estimate the average number of hours of sleep students...
A professor at a university wants to estimate the average number of hours of sleep students get during exam week. On the first day of exams, she asked 21 students how many hours they had slept the night before. The average of the sample was 4.72 with a standard deviation of 1.58. When estimating the average amount of sleep with a 90% confidence interval, what is the margin of error? Question 3 options: 1) 0.5947 2) 0.5933 3) 0.3448 4)...
For a 4-units class like Statistics, students should spend average of 12 hours studying for the...
For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 3 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
From past studies, the average time college freshmen spend studying in 22 hours per week. The...
From past studies, the average time college freshmen spend studying in 22 hours per week. The standard deviation is 4 hours. This year, 60 students were surveyed, and the average time that they spent studying was 20.8 hours. Test the claim that the time students spend studying has not changed. Use a=1%
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 24 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 2.8 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 14 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 20 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between ____ hours and ____ hours on Statistics each week. b) 95% of the students spend between...
The University College is interested in the average number of hours per week that freshmen spend...
The University College is interested in the average number of hours per week that freshmen spend going to parties. They took a random sample of 300 freshmen and calculated a mean of 6 hours a week going to parties and a 95% confidence interval for the population mean to be 4 to 8 hours a week. Based on this information, what was their standard error of the mean? Group of answer choices 4 2 1 .67
In order to determine how many hours per week freshmen college students watch television, a random...
In order to determine how many hours per week freshmen college students watch television, a random sample of 25 students was selected. It was determined that the students in the sample spent an average of 19.5 hours with a sample standard deviation of 3.9 hours watching TV per week. Please answer the following questions: (a) Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week. (b) Assume that a...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT