For each of the following situations, indicate whether it calls for:

A. An independent-samples comparison of proportions

B. An independent-samples comparison of means

C. A matched-pairs comparison of means

1. Ten diamond rings are shown to two jewellers and each jeweller is asked to determine the appraisal value for each ring. The goal is to test whether the two jewellers give the same appraisal values on average.22:05 PM

2. A sample of 10 faculty members and a sample of 20 students are asked how much time they spent on schoolwork last weekend. The goal is to test whether one group tends to spend more weekend time on average than the other on schoolwork.

3. A sample of 40 male students and a sample of 40 female students are asked whether they attended last week's football game. The goal is to test whether male students are more likely to attend football games than are female students.

4. A student takes a random sample of 40 sentences from her history book and a random sample of 40 sentences from her statistics book, recording the length (number of words) in each sentence, testing whether sentences in her history textbook tend to be longer than sentences in her statistics textbook.

5. A sample of 20 students compared their scores on the most recent math exam and the most recent English exam. The goal is to test whether one exam tended to be harder (as judged by student scores) on average than the other.

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1 B An independentsamples comparison of means ... View the full answer