The following data on maximum weight of lift (MAWL, in kg) for a frequency of four lifts/min was

reported in the paper “The Effects of speed, Frequency, and Load on Measured Hand Forces for a

Floor-to-Knuckle Lifting Task.” Subjects were randomly selected from the population of healthy

males aged 18-30. Assuming that MAWL is normally distributed, does the data suggest that the

population mean MAWL exceeds 25? Carry out a test using a significance level of 0.05

25.8 36.6 26.3 21.8 27.2

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In the solution the teacher said H_0: m= 25; H_1: m>25

Why did she put the test in this manner? I instead did H_0: m>25 ; H_1: m<or= 25. How can I understand the way I shall lay down the test, like what is H_0 and H_1? Thank you very much.