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Which are the correct null and alternative hypotheses?

Which are the correct null and alternative hypotheses?

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The following are the average grade of a sample of 20 Senior High School students for the first semester. Test the claim that the average grade of the students is LESS THAN 90. Use 5% level of significance. 91 88 93 95 95 85 89 93 89 91 91 92 89 89 84 87 88 88 89 93 Which are the correct null and alternative hypotheses? O a. Ho: The average grade of the students is not equal to 90. Ha: The average grade of the students is not equal to 90. O b. Ho: The average grade of the students is less than 90. Ha: The average grade of the students is equal to 90. Ос. Ho: The average grade of the students is greater than 90. Ha: The average grade of the students is greater than 90. O d. Ho: The average grade of the students is equal to 90. Ha: The average grade of the students is less than 90.
Transcribed Image Text:The following are the average grade of a sample of 20 Senior High School students for the first semester. Test the claim that the average grade of the students is LESS THAN 90. Use 5% level of significance. 91 88 93 95 95 85 89 93 89 91 91 92 89 89 84 87 88 88 89 93 Which are the correct null and alternative hypotheses? O a. Ho: The average grade of the students is not equal to 90. Ha: The average grade of the students is not equal to 90. O b. Ho: The average grade of the students is less than 90. Ha: The average grade of the students is equal to 90. Ос. Ho: The average grade of the students is greater than 90. Ha: The average grade of the students is greater than 90. O d. Ho: The average grade of the students is equal to 90. Ha: The average grade of the students is less than 90.
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