b. Estimation C. t-test d. z-test at is/are the critical value/s? a. +/-2.086 b. +/-2.093 C. -1.725 d. -1.729 at is the mean grade of the students? a. 88.75 b. 89.95
b. Estimation C. t-test d. z-test at is/are the critical value/s? a. +/-2.086 b. +/-2.093 C. -1.725 d. -1.729 at is the mean grade of the students? a. 88.75 b. 89.95
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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Question
Based from the first pic. Then answer the 3 questions only with complete solutions and answer thank you
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
Transcribed Image Text:What test statistic is applicable in this situation?
O a. Pearson's rtest
O b. Estimation
O c. t-test
O d. z-test
What is/are the critical value/s?
O a. +/-2.086
O b. +/-2.093
O c. -1.725
O d. -1.729
What is the mean grade of the students?
O a. 88.75
O b. 89.95
O c. 90.00
O d. 85.95
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