# Question

Employees in a large manufacturing plant worked an average of 62.0 hours of overtime last year, with a standard deviation of 15.0 hours. For a simple random sample of n = 36 employees and x = the number of overtime hours worked last year, determine the z-score corresponding to each of the following sample means:

a. x-bar = 55.0 hours

b. x-bar = 60.0 hours

c. x-bar = 65.0 hours

d. x-bar = 47.0 hours

a. x-bar = 55.0 hours

b. x-bar = 60.0 hours

c. x-bar = 65.0 hours

d. x-bar = 47.0 hours

## Answer to relevant Questions

For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work ...The tensile strength of spot welds produced by a robot welder is normally distributed, with a mean of 10,000 pounds per square inch and a standard deviation of 800 pounds per square inch. For a simple random sample of n = 4 ...A simple random sample with n = 300 is drawn from a binomial process in which π = 0.4. Determine the following probabilities for p = the proportion of successes: a. P(p ≥ 0.35) b. P(0.38 ≤ p ≤ 0.42) c. P(p ≤ 0.45) What is meant by a finite population and how can this affect the sampling distribution of a mean or a proportion? Repeat Exercise 8.40, but with n = 30 observations in each sample. Repeat ExercisePost your question

0