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 1% level of significance.

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46 42 54 52 48 45 49 49 50 46 55 55 53 54 48

The hypotheses for this problem are: H₀: = 47

H_1: > 47

What is the correct summary?

A. There is not enough evidence to support the claim that the mean workweek for employees at start-up companies work more than 47 hours.

B. There is enough evidence to support the claim that the mean workweek for employees at start-up companies work more than 47 hours.