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The estimate the current average retirement age of US citizens a researcher sampled 42 recently retired individuals. The sample data yielded mean 64.3 years and

The estimate the current average retirement age of US citizens a researcher sampled 42 recently retired individuals. The sample data yielded mean 64.3 years and standard deviations0.5year. A95% confidence interval for the true mean retirement age of all recently retired individuals is about:

Answer Choices:

(64.16, 64.44)

(64.15, 64.45)

(64.07, 64.53)

(64.13, 64.47)

(64.05, 64.55)

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