Labor productivity 2020, part 2.

Using a statistics program, consider again the relationship between the number of employments and value of production of U.S. industries that you analyzed in Exercise 37.

a) Give a 90% confidence interval for the approximate increase in the value of production associated with each additional thousand employments.

b) For the industries studied, the mean number of employments was 420,000. The number of employments in the Mining industry is approximately 600,000. Predict the value of production for industries of that size with an interval in which you have 90% confidence.