Question

Randomly selected students participated in an experiment to test their ability to determine when one minute​...

Randomly selected students participated in an experiment to test their ability to determine when one minute​ (or sixty​ seconds) has passed. Forty students yielded a sample mean of 59.7 seconds. Assuming that sigma =10.1 ​seconds, construct and interpret a 90​% confidence interval estimate of the population mean of all students.

What is the 90​% confidence interval for the population mean μ​?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Randomly selected students participated in an experiment to test their ability to determine when one minute​...
Randomly selected students participated in an experiment to test their ability to determine when one minute​ (or sixty​ seconds) has passed. Forty students yielded a sample mean of 62.4 seconds. Assuming that σ=8.5 seconds, construct and interpret a 99​% confidence interval estimate of the population mean of all students. What is the 99​% confidence interval for the population mean μ​? ____<μ<_____
Randomly selected statistics students participated in an experiment to test their ability to determine when 1...
Randomly selected statistics students participated in an experiment to test their ability to determine when 1 minute (or 60 seconds) has passed. Forty students yielded a sample mean of 58.3 sec with a standard deviation is 9.5 sec, construct a 95% confidence interval estimate of the population mean of all statistics students. A. 50.4 sec < mu  < 77.8 B. 54.5 sec < mu  < 63.2 C. 56.3 sec < mu  < 62.5 D. 55.4 sec < mu  < 61.2 Based on the Confidence...
Randomly selected statistics students of the author participated in an experiment to test their ability to...
Randomly selected statistics students of the author participated in an experiment to test their ability to determine when 60 seconds has passed. Forty students yielded a sample mean of 57.3 sec. Assume that the population standard deviation is σ = 8.5 sec. a) Find the critical value zα /2 for a 82% confidence interval b) Construct a 82% confidence interval estimate of the population mean of all statistics students. Use the z-table method. c) Use TI84/83 calculator method. d) Write...
Time perception. Randomly selected college students participated in an experiment that tested their ability to determine...
Time perception. Randomly selected college students participated in an experiment that tested their ability to determine the course of 1 minute (or 60 seconds). Forty students produced a sample mean of 58.3 seconds. Assuming that the standard deviation is 9.5 seconds, use a significance level of 0.05 to test the assertion that the population mean is less than 60 seconds.
Actual times​ (in seconds) recorded when statistics students participated in an experiment to test their ability...
Actual times​ (in seconds) recorded when statistics students participated in an experiment to test their ability to determine when one minute​ (60 seconds) had passed are shown below. Find the​ mean, median, and mode of the listed numbers. 55  50  74  61  67  60  47  47
A sample of 25 randomly selected students has a mean test score of 81.5 with a...
A sample of 25 randomly selected students has a mean test score of 81.5 with a standard deviation of 10.2. Assuming that the population has a normal distribution, use this sample data to construct a 95% confidence interval for the population mean μ of all test scores. A. (77.29, 85.71) B. (56.12, 78.34) C. (87.12, 98.32) D. (66.35, 69.89)
2. The principal randomly selected six students to take an aptitude test. Their scores (from a...
2. The principal randomly selected six students to take an aptitude test. Their scores (from a normal distribution) were: 83.0 84.1 83.5 83.7 84.1 73.5 a. Determine a 90 percent confidence interval for the mean score for all students.  Show all work.  Identify the standard error, and all calculations of the margin of error. Does it appear as if the mean score was better than 84?  Write the findings as you would in a report (interpret the interval.) b.Assume now that sigma was...
The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of...
The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of $ 3660. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance sigma squared and the population standard deviation sigma. Use a 90 % level of confidence. Interpret the results.
The data set represents the scores of 12 randomly selected students on the SAT Physics Subject...
The data set represents the scores of 12 randomly selected students on the SAT Physics Subject Test. Assume the population test scores are normally distributed and the population standard deviation is 103. (Adapted from The College Board) 670 740 630 620 730 650 720 620 640 500 670 760 (a) Find the point estimate of the population mean. (b) Construct a 90% confidence interval for the population mean. Interpret the results. (c) Determine the minimum sample size required to be...
16 students were randomly selected from a large group of students taking a certain calculus test....
16 students were randomly selected from a large group of students taking a certain calculus test. The mean score for the students in the sample was 86 and the standard deviation was 1.3. Assume that the scores are normally distributed. Construct a 98% confidence interval for the mean score, μ, of all students taking the test. Round your answer to two decimal places.