A researcher wants to test whether there is a significant difference in average exam scores between students taught using Method A and those taught using Method B. Each student experiences only one method. What is the appropriate null hypothesis for an independent samples t-test?

Question

Answer

The mean exam score for Method A is equal to the mean score for Method B.

Answer

The difference in exam scores within each student is equal to zero.

Answer

The mean exam score for Method A is greater than the mean score for Method B.

Answer

The mean exam score for Method A is less than the mean score for Method B.

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A researcher wants to test whether there is a significant difference in average ...

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