According to a survey, the average young adult male plays video games for4

hours per week. To test if the amount of video games in college is less than the national average, a researcher decides to do a hypothesis test, at a10%

significance level. He surveys16

male college students randomly and asks them about their amount of video games each week, on average. From the data, the sample mean time is3

hours per week, and the sample standard deviation (s

) is1.2

hours.

• H
• 0
• :4
• ;H
• a
• :>4
• .
• =0.1
• (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.