You are interested in whether students that have a male instructors perform differently on exams. To investigate this, you gather a sample of 5 students that have a male instructor and compare their exam average to the average of all instructors. The data are below:
|
Male Instructors |
All Instructors |
|
x ̅=74.5 |
µ=76.8 |
|
s = 7.62 |
Do you reject or fail to reject your null hypothesis?
|
Reject the null hypothesis |
||
|
Fail to reject the null hypothesis |
You are interested in whether students that have a male instructors perform differently on exams. To...
6. Math instructors are not only interested in how their students do on exams, on average, but how the exam scores vary. To many instructors, the variance, or standard deviation, may be more important than the average. Suppose a math instructor believes that the standard deviation for his final exam is 4.3 points. One of his best students thinks otherwise. The student claims that the standard deviation is more than 4.3 points. The student asks 15 of his classmates for...
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A researcher is interested in determining whether there is a difference in male college students and female college students' preference for taking online classes over on-campus classes. The researcher surveys 82 female students, and found that 15 preferred online classes. The researcher surveys 70 male students, and found that 10 preferred online classes. Let's perform a hypothesis test at the 5% significance level. Test whether the proportion of females who prefer online classes is greater than the proportion of males...
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