A team of statistics education researchers want to know if students perceived knowledge of introductory statistics differ at the beginning and end of a research study.

They obtain a sample of 46 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 0.522 points with a standard deviation of 1.859 points.

What is the value of the t test statistic?

A)

1.904

B)

0.281

C)

2.021

D)

0.274