For Exercises perform each of the following steps.

a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.
Use the traditional method of hypothesis testing unless otherwise specified.

At age 9 the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. At α = 0.05, do the data support the given claim that there is a difference in heights?

Transcribed Image Text:

Sample size Mean height, cm Population variance Boys 60 123.5 98 Girls 50 126.2 120