The average hourly wage of computer programmers with 2 years of experience has been $21.80.Because of high demand for computer programmers, it is believed there has been a significant increase in the average hourly wage of computer programmers.To test whether or not there has been an increase, the correct hypotheses to be tested are

A) H₀: μ < 21.80 H_a: μ ≥ 21.80.
B) H₀: μ = 21.80 H_a: μ ≠ 21.80.
C) H₀: μ > 21.80 H_a: μ ≤ 21.80.
D) H₀: μ ≤ 21.80 H_a: μ > 21.80.

Question

Sienisha Cooper · Accepted Answer

Final Answer : D, Explanation :  The null hypothesis (H0) is a statement of no change or no effect, so it should reflect the condition before the suspected increase, which is that the average wage is less than or equal to $21.80. The alternative hypothesis (Ha) is what the test aims to provide evidence for, which in this case is that the average wage has increased, hence it should be greater than $21.80. Therefore, the correct hypotheses are H0: μ ≤ 21.80 and Ha: μ > 21.80.

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