92 Section Exercise The average credit card debt for a recent year was $9192. Five years earlier the average credit card debt was $6618. Assume sample sizes of 31 were used and the population standard deviations of both samples were $1931. Find the 99% confidence interval of the difference in means. Use u, for the most recent average debt. Round the answers to two decimal places. s >ri- 'ri> ola

92 Section Exercise The average credit card debt for a recent year was $9192. Five years earlier the average credit card debt was $6618. Assume sample sizes of 31 were used and the population standard deviations of both samples were $1931. Find the 99% confidence interval of the difference in means. Use u, for the most recent average debt. Round the answers to two decimal places. s >ri- 'ri> ola

Name: 9.2 Section Exercise 18The average credit card debt for a recent year
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: 9.2 Section Exercise 18The average credit card debt for a recent year was $9192. Five years earlier the average credit card debt was $6618. Assumesample sizes of 31 were used and the population standard deviations of both samples were $1931. Find th

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The annual earnings of 14 randomly selected computer software engineers have a sample standard deviation of $3621. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance o² and the population standard deviation 6. Use a 99% level of confidence. Interpret the results. What is the confidence interval for the population variance o²?
You measure 31 turtles weights…
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 68 dates, the mean record high daily temperature in a certain city has a mean of 83.88°F. Assume the population standard deviation is 14.06°F. The 90% confidence interval is??
You measure 43 textbooks' weights, and find they have a mean weight of 49 ounces. Assume the population standard deviation is 14.5 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight.Give your answers as decimals, to two places _____ < μ < ______
Given a sample data set with a Standard Deviation of 1.34, what is the Variance of the data set.? Round your answer to two digits after the decimal point.
You sample 36 students to find out how many hours they spent online last week. Your sample mean is 54. The population standard deviation, sigma, is 8.2. Your client now wants the 90% confidence interval for this sample mean. It is: 40.1 to 67.9 51.8 to 56.2 40.5 to 67.5 51.0 to 56.0
You measure 50 textbooks' weights, and find they have a mean weight of 58 ounces. Assume the population standard deviation is 14.7 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight.Report your answers to three decimal places. Confidence Interval = ( , )
3. Given the following GPA for 4 students: 2, 3, 3, 4. Age of students are: 10, 11,12, 15. There are 10,000 total students. Average GPA: Unknown, StandardDeviation of GPA: 0.02 and it’s Normal.a. Find the mean and standard deviation for GPA.b. Calculate a 95% confidence interval for the populations mean GPA.c. Use Correlation formula to find r between GPA and Age.d. Find Regression Line Equation.e. If a student’s age is 13, what is the corresponding GPA?
You measure 38 dogs' weights, and find they have a mean weight of 64 ounces. Assume the population standard deviation is 5.6 ounces. Based on this, construct a 99% confidence interval for the true population mean dog weight. Round Iyour answers to two decimal places. <με Enter an integer or decimal number [more..
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 49 business days, the mean closing price of a certain stock was $109.89 . Assume the population standard deviation is $10.27 .
Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
Suppose that textbook weights are normally distributed. You measure 30 textbooks' weights, and find they have a mean weight of 65 ounces. Assume the population standard deviation is 11.6 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places.? ? ?