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Name: The Head of the Mathematics Department announced that the mean score o
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Description: The Head of the Mathematics Department announced that the mean score of Grade 11 students in the second periodic test in Statistics was 89, and the standard deviation was 12. One student believed that the mean score was less than this, so the student

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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The Head of the Mathematics Department announced that the mean score of Grade 11 students in the second periodic test in Statistics was 89, and the standard deviation was 12. One student believed that the mean score was less than this, so the student randomly selected 34 students and computed their mean score, and obtained a mean score of 85. At 0.01 level of significance, construct the critical regions.

(a) state the null and the alternative hypothesis
(b) compute the test statistic,

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