Questions
BU.510.601.K1.FA25 Quiz 2- Requires Respondus LockDown Browser
Single choice
The average checkout time () at a local Safeway grocery store is hypothesized to be 3 minutes or less (null hypothesis H0: <=3). A sample of 36 customers at the local store shows an average checkout time of 3.3 minutes with a standard deviation of 0.6 minutes. Using a one-sided z-test, what is the p-value of the observed z-statistic for testing H0: <=3 versus Ha: > 3.
Options
A.0.0014
B.0.0035
C.0.0024
D.0.0052
E.0.0073
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Step-by-Step Analysis
The problem asks for the p-value of a one-sided z-test for the hypothesis H0: μ ≤ 3 versus Ha: μ > 3, given a sample mean of 3.3, sample size n = 36, and a reported standard deviation of 0.6.
Option-by-option analysis:
- Option 0.0014: To evaluate, compute the z-statistic using z = (x̄ − μ0) / (σ/√n). Here, x̄ = 3.3, μ0 = 3, σ = 0.6, n = 36, so σ/√n = 0.6......Login to view full explanationLog in for full answers
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