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.

Test the claim using a 5% level of significance.

The hypotheses for this problem are:

H₀: = 47

H_1: > 47

What is the correct decision?

Accept H0

Reject H1

Do not reject H0

Do not reject H1

Reject H0