An Analyst Plans to Test Whether the Standard Deviation for the Time

Multiple Choice

An analyst plans to test whether the standard deviation for the time it takes bank tellers to provide service to customers exceeds the standard of 1.5 minutes.The correct null and alternative hypotheses for this test are:

A) H₀ : σ > 1.5
H_A : σ ≥ 1.5
B) H₀ : σ ≤ 1.5
H_A : σ > 1.5
C) H₀ : σ² ≤ 2.25
H_A : σ² > 2.25
D) H₀ : σ² > 2.25