In a national survey, middle school students report spending 3.1 hours per week on homework. Mr. Jones suspects that his students study more than the national average. Mr. Jones asks his class of 24 students about the amount of time they spend on homework, and the average for his class is 3.4 hours per week. Mr. Jones assumes the standard deviation of homework time in the population is 1.9 hours per week. What is the test statistic?

ans choices

0.77

0.032

3.37

0.30