a. What salary would you expect for a 50-year-old individual? b. Find the 95% confidence interval for

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a. What salary would you expect for a 50-year-old individual?
b. Find the 95% confidence interval for a new individual (from the same population from which the data were drawn) who is 50 years old.
c. Find the 95% confidence interval for the mean salary of all 50-year-olds in the population.
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