The Average Number of Hours for a Random Sample of Mail

The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are

A) H₀: u > 50.1, H_a: u < 50.1.
B) H₀: u = 50.1, H_a: u = 50.1.
C) H₀: u ≤ 50.1, H_a: u > 50.1.
D) H₀: u ≥ 50.1, H_a: u < 50.1.

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