Question

Suppose the university wants to determine what proportion of students prefer online tests to in-class tests....

Suppose the university wants to determine what proportion of students prefer online tests to in-class tests. The university invites the students to participate in a survey and out of 130 students that responded 39 prefer online testing.
(a) Find the 90% confidence interval for the true proportion of students that prefer online testing.
(b) What is the minimum number of students that should answer the survey in order to know with at least 98% certainty that the true proportion of students that prefer online testing lies within 2% of the estimate given by the survey results?
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

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
A local restaurant wants to determine what proportion of their customers prefer red wine with dinner...
A local restaurant wants to determine what proportion of their customers prefer red wine with dinner instead of white wine. If they use a 99% level of confidence, how many customers do they need to survey to be within 2.5% of the true proportion?
A survey of 180 students is selected randomly on a large university campus. They are asked...
A survey of 180 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 90 of the 180 students responded "yes". An approximate 98% confidence interval is (0.413, 0.587). Complete parts a through C. a) How would the confidence interval change if the confidence level has been 95% instead of 98% b) How would confidence interval change if the sample size...
A university planner wants to determine the proportion of spring semester students who will attend summer...
A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 35 current students discovering that 15 will return for summer school. At 90% confidence, compute the lower bound of the interval estimate for this proportion.
A university planner wants to determine the proportion of spring semester students who will attend summer...
A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 32 current students discovering that 17 will return for summer school. At 90% confidence, compute the lower bound of the interval estimate for this proportion.
1/ A physical therapist wants to determine the difference in the proportion of men and women...
1/ A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if she wishes the estimate to be within five percentage points with 95​% confidence, assuming that ​(a)she uses the estimates of 21.8​% male and 18.3​% female from a previous​ year? n = (Round up to the nearest whole​ number.) ​(b) she does not use any prior​ estimates? 2/ A survey​ asked,...
The Office of the Registrar at NUST wants to determine the proportion of students who visit...
The Office of the Registrar at NUST wants to determine the proportion of students who visit their library facility on a regular basis. the Chief Librarian of the library facility claimed that more than 20% of all students visit their library on a regular basis, thus, in recent survey covering a random sample of 256 students indicated that 48 of them visited the facility on a regular basis. 1. Estimate and interpret the 90% and 95% confidence interval estimates for...
Suppose a professor wants to estimate the proportion of UM students who have a satisfying experience...
Suppose a professor wants to estimate the proportion of UM students who have a satisfying experience with the e-learning approach adopted by the school in the current semester. What is the minimum sample size that he should use if he wants the estimate to be accurate within ±0.06 with a 90% confidence? Select one: a. 752 b. 267 c. 188 d. 456
9- The dean of the school wants to know the proportion of students in the school...
9- The dean of the school wants to know the proportion of students in the school who prefer online classes for the next semester. How do you conduct a research to estimate this proportion by sampling (suppose that you can take only one sample of size n which is smaller than the population size N, and also suppose that a %90 percent confidence interval is fine). - You should explain all steps you take including how you make decision about...
9- The dean of the school wants to know the proportion of students in the school...
9- The dean of the school wants to know the proportion of students in the school who prefer online classes for the next semester. How do you conduct a research to estimate this proportion by sampling (suppose that you can take only one sample of size n which is smaller than the population size N, and also suppose that a %90 percent confidence interval is fine). - You should explain all steps you take including how you make decision about...
Suppose a professor wants to estimate the proportion of UM students who have a satisfying experience...
Suppose a professor wants to estimate the proportion of UM students who have a satisfying experience with the e-learning approach adopted by the school in the current semester. What is the minimum sample size that he should use if he wants the estimate to be accurate within ±0.06 with a 90% confidence? Select one: a. 267 b. 752 c. 456 d. 188 If P(A) = 0.4 and P(B) = 0.6, which of the following must be true? Select one: a....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT