According to a survey, the average American person reads for3

hours per week. To test if the amount of reading in Chicago is less than the national average, a researcher decides to do a hypothesis test, at a1%

significance level. She surveys25

Chicagoans randomly and asks them about their amount of weekly reading time, on average. From the data, the sample mean time is2.4

hours per week, and the sample standard deviation (s

) is0.9

hours.

• H
• 0
• :=3
• ;H
• a
• :<3
• .
• =0.01
• (significance level)

What is the test statistic (t

-value) of this one-mean hypothesis test (with

unknown)?

• Round your final answer to two decimal places.