Essay
A statistics course at a large university is taught in each semester. A student has noticed that the students in semester 1 and semester 2 are enrolled in different degrees. To investigate, the student takes a random sample of 25 students from semester 1 and 25 students from semester 2 and records their final marks (%) provided in the table below. Excel was used to generate descriptive statistics on each sample.
Assume that student final marks are normally distributed in each semester. 
Can we conclude at the 5% significance level that the variance of semester 1 student's final marks is greater than 150?
Correct Answer:
Verified
Ho: ?12 = 150
HA: ?12 > 150
Rejection region: 
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Correct Answer:
Verified
HA: ?12 > 150
Rejection region:
...View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
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