It is known that the scores of an exam vary in a certain population with values according to a normal distribution of unknown mean and standard deviation. In a sample of 13 notes from this population, the following results were obtained: 54 63 61 63 63 59 63 61 60 57 55 62 58 a. Considering the 92% two-sided confidence interval for the mean exam score of a certain population, what is the lower bound of this interval? b. Considering the 92% two-sided confidence interval for the mean exam score of a certain population, what is the upper limit of this interval? c. With the information obtained in this sample, calculate what would be the margin of error of a 99.9% confidence interval for the mean score in the exam of a certain population.
It is known that the scores of an exam vary in a certain population with values according to a normal distribution of unknown mean and standard deviation. In a sample of 13 notes from this population, the following results were obtained: 54 63 61 63 63 59 63 61 60 57 55 62 58 a. Considering the 92% two-sided confidence interval for the mean exam score of a certain population, what is the lower bound of this interval? b. Considering the 92% two-sided confidence interval for the mean exam score of a certain population, what is the upper limit of this interval? c. With the information obtained in this sample, calculate what would be the margin of error of a 99.9% confidence interval for the mean score in the exam of a certain population.
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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It is known that the scores of an exam vary in a certain population with values according to a
54 | 63 | 61 | 63 | 63 | 59 | 63 | 61 | 60 | 57 | 55 | 62 | 58 |
a. Considering the 92% two-sided confidence interval for the mean exam score of a certain population, what is the lower bound of this interval?
b. Considering the 92% two-sided confidence interval for the mean exam score of a certain population, what is the upper limit of this interval?
c. With the information obtained in this sample, calculate what would be the margin of error of a 99.9% confidence interval for the mean score in the exam of a certain population.
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