A sample of 20 items provides a sample standard deviation of 5.a. Compute the 90% confidence interval estimate of the population variance (to 2 decimals). Use Table 11.1.\[ \underline{\hspace{1cm}} \leq \sigma^2 \leq \underline{\hspace{1cm}} \]b. Compute the 95% confidence interval estimate of the population variance (to 2 decimals). Use Table 11.1.\[ \underline{\hspace{1cm}} \leq \sigma^2 \leq \underline{\hspace{1cm}} \]c. Compute the 95% confidence interval estimate of the population standard deviation (to 1 decimal). Use Table 11.1.\[ \underline{\hspace{1cm}} \leq \sigma \leq \underline{\hspace{1cm}} \]Each interval will be calculated using the sample standard deviation and the Chi-square distribution values from Table 11.1 for the respective confidence levels.

We have given that Sample size n=20 , sample standard deviation s= 5 Degree of freedom = n -1

Answered: A sample of 20 items provides a sample…

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

Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 16, upper bound is 26. The point estimate of the population mean is
In a random sample of ten cell phones, the mean full retail price was $456.00 and the standard deviation was $211.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean μ. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) 0.
Find the 80% confidence intervals for the variance and standard deviation of the ages of seniors at Oak Park College if a random sample of 28 students have a standard deviation of 2 years. Assume the variable is normally distributed. Use the chi-square distribution table to find any chi-square values to three decimal places. Round the final answers to one decimal place.
You plan to build a 95% confidence interval estimate of the mean of a large population. You want a margin of error no larger than +10. You estimate the population standard deviation to be 200. How large a sample is needed?
The previous mean amount of time spent using the lab computer was 63minutes. Find a 95% confidence interval for the true mean. Make a conclusion about the claim. If there are outliers, find intervals with and without the outliers present.
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 19, upper bound is 23. The point estimate of the population mean is
A confidence interval for a mean is (-11, 10). This interval would be wider if The sample mean was larger or the variability of the data was larger. The investigator wanted to be more confident of their results, or there was more information. The variability of the data was small, or the sample mean was larger. The variability of the data was larger, or the investigator wanted to be more confident. None of the above.
The mean number of travel days per year for salespeople employed by three hardware distributors needs to be estimated with a 0.90 degree of confidence. For a small pilot study, the mean was 150 days and the standard deviation was 16 days. If the population mean is estimated within two days, how many salespeople should be sampled? 174 616 673 2756
Heights for teenage boys and girls were calculated. The mean height for the sample of 73 boys was 167 cm and the variance was 71. For the sample of 47 girls, the mean was 180 cm and the variance was 66. There is no reason to assume the variances would be equal. Estimate how much taller teenage boys are using a 96% confidence level. Express this in the (point estimate) ± (margin of error) format. Round answers to 2 decimal places. H
We are going to calculate the standard deviation for the following set of sample data. 13,9,11,13,5 1) First, calculate the mean. 2) Fill in the table below. Fill in the differences of each data value from the mean, then the squared differences. 3) Calculate the standard deviation. (x – a)² 13 9 11 13 Total Standard deviation: - Round to two decimal places S = п — 1
Determine the sample size required to estimate the mean score on a standardized test within 2 points of the true mean with 98% confidence. Assume that s = 15 based on earlier studies. C O A. 1 O B. 18 OC. 407 O D. 306
Answer numbers 3 to 5 only

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS