1. What t* multiplier should be used to construct a 95% confidence interval with 41 degrees of freedom?

Round your answer to 3 decimal places.

2. A team of statistics education researchers wants to know if students' perceived knowledge of introductory statistics differ at the beginning and end of a research study. They are testing the following hypotheses:

0:=0

:>0

They obtain a sample of 109 students. At the beginning and end of the study they ask students to rate their perceived knowledge of statistics on a scale of 1 to 9. The average difference from beginning to end is 0.81 points with a standard deviation of 3.4 points.

Compute the t test statistic. Round your final answer to 3 decimal places.

3. Research question:Is the mean score on a measure of statistics anxiety different from 40 points in the population of all introductory statistics students?

Researchers plan to address this research question using the following hypotheses:

0:=40

:40

In a representative sample of 85 introductory statistics students, data were skewed to the right with a mean of 45.956 points and standard deviation of 14.155 points. The shape of the population is unknown.

Given the information above, is it appropriate to use the t distribution to approximate the sampling distribution?

No, we should not use the t distribution

or

Yes, we can use the t distribution