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Independent means assuming non-pooled in course

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Wize University Statistics Textbook > Inference for Two Population Means

Unpooled t-test

3 Activities

Professor Karl has two large statistics classes. He teaches one class in the morning and one in the evening. He samples students in both classes to assess his teaching performance. He uses their latest quiz marks for his assessment.

Here is some summarized statistics:


Suppose that the test statistic for comparing the means is 0.701, what is the approximate range of the p-value?
More Unpooled t-test Questions:
Two-Sided Non-Pooled T-Test
The IQ scores for two groups of students are compared. In one group, the students went to University and had a Bachelor’s degree. In the second group, all students went to community college. A simple random sample of each group is selected and students took an IQ test. Here are the summarized results:
Suppose that the researchers want to test the hypothesis that the mean IQ scores are different.
a) State in words and in symbols, the appropriate Ho and Ha