Digital Cameras

Question

A magazine includes a report on the prices of subcompact digital cameras. The article states that 11 randomly selected subcompact digital cameras have a sample standard deviation of $109. Use an 80% level of confidence.

A. Construct an 80% confidence interval for the population variance

B. Construct an 80% confidence interval for the population standard deviation

C. Interpret your results

Question

A warehouse employs 24 workers on first shift and 17 workers on second shift. Eight workers are chosen at random to be interviewed about the work environment. Find the Probability of choosing:

A. All first-shift workers

B. All second-shift workers

C. Six first-shift workers

D. Four second-shift workers