Use the Following Information for Questions

Use the following information for questions:
A random sample of 850 high school girls showed that 400 had done strenuous exercise over the past year. The researcher wants to test the hypotheses below for p = the proportion of all high school girls who do strenuous exercise.
H₀: p ≥ 0.50
H_a: p < 0.50
-Verify necessary data conditions for a z-statistic and calculate the z-statistic.

Correct Answer:

Verified

np₀ = n(1 - p₀) = 425 > 10, so t...

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