Having trouble with this one as well.

Question 20 (1 point) The workweek for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then working adults in the US. She asks 15 engineering friends at start-ups for the lengths in hours of their workweek. Their responses are shown in the table below. Test the claim using a 5% level of significance. See Excel for Data. Work Hour Data The hypotheses for this problem are: Ho L = 47 H1: H > 47 Find the test statistic. Round answer to 4 decimal places. Test Statistic t = Submit Quiz 17 of 20 questions saved