# Answer to Question #19987 in Statistics and Probability for Bob

Question #19987

Use the given degree of confidence and sample data to construct a confidence interval for the population means. A random sample of 15 light bulbs had a mean life of 548 hours and a sample standard deviation of 29 hours. Find a 90 percent confidence interval for the mean life, μ, of all light bulbs of this type.

Expert's answer

## Comments

## Leave a comment