It is claimed that in a bushel of peaches, fewer than 10% are defective. A sample of 400 peaches is examined and 82 are found to be defective. What is the z-test statistic? Select one: a. +0.205 b. -6.978 c. +0.358 d. +7.000
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The formula for the z-test statistic for a proportion is: $$z = \frac{\hat{p} - p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}$$ where: - $\hat{p}$ is the sample proportion - $p_0$ is the hypothesized population proportion - $n$ is the sample size Step 2: Identify the given Show more…
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