A research center claims that more than 80% of females ages 20–29 are taller than 62 inches. In a random sample of 150 females ages 20–29, 79% are taller than 62 inches. At α = 0.10, is there enough evidence to support the center’s claim?
(a) Identify the claim and state H0 and Ha,
(b) Find the critical value(s) and identify the rejection region(s),
(c) Find the standardized test statistic z,
(d) Decide whether to reject or fail to reject the null hypothesis,
(e) Interpret the decision in the context of the original claim. If convenient, use technology.
Solution:
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