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Here are summary statistics for randomly selected weights of newborn girls: n = 206, x= 33.6 hg, s= 7.8 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 31.6 hg

Here are summary statistics for randomly selected weights of newborn girls: n = 206, x= 33.6 hg, s= 7.8 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 31.6 hg

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t,2, (b) find the critical value z12, or (c) state that neither the normal distribution 40- nor the t distribution applies. 30- The confidence level is 90%, o is not known, and the histogram of 61 player salaries (in thousands of dollars) of football players on a team is as shown. 20- 10- 4000 8000 12000 16000 2000 Salary (thousands of dollars) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2 = (Round to two decimal places as needed.) В. Za12 (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies. Frequency
Transcribed Image Text:Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t,2, (b) find the critical value z12, or (c) state that neither the normal distribution 40- nor the t distribution applies. 30- The confidence level is 90%, o is not known, and the histogram of 61 player salaries (in thousands of dollars) of football players on a team is as shown. 20- 10- 4000 8000 12000 16000 2000 Salary (thousands of dollars) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2 = (Round to two decimal places as needed.) В. Za12 (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies. Frequency
Here are summary statistics for randomly selected weights of newborn girls: n = 206, x = 33.6 hg, s = 7.8 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 31.6 hg < µ< 35.8 hg with only 17 sample values, x= 33.7 hg, and s = 3.4 hg? What is the confidence interval for the population mean µ? hg < µ < hg (Round to one decimal place as needed.) Are the results between the two confidence intervals very different? O A. No, because the confidence interval limits are similar. B. No, because each confidence interval contains the mean of the other confidence interval. C. Yes, because one confidence interval does not contain the mean of the other confidence interval. D. Yes, because the confidence interval limits are not similar.
Transcribed Image Text:Here are summary statistics for randomly selected weights of newborn girls: n = 206, x = 33.6 hg, s = 7.8 hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval 31.6 hg < µ< 35.8 hg with only 17 sample values, x= 33.7 hg, and s = 3.4 hg? What is the confidence interval for the population mean µ? hg < µ < hg (Round to one decimal place as needed.) Are the results between the two confidence intervals very different? O A. No, because the confidence interval limits are similar. B. No, because each confidence interval contains the mean of the other confidence interval. C. Yes, because one confidence interval does not contain the mean of the other confidence interval. D. Yes, because the confidence interval limits are not similar.
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