# Question

A hospital administration wants to estimate the mean time spent by patients waiting for treatment at the emergency room. The waiting times (in minutes) recorded for a random sample of 35 such patients are given below. The population standard deviation is not known.

Construct a 99% confidence interval for the corresponding population mean.

Construct a 99% confidence interval for the corresponding population mean.

## Answer to relevant Questions

A local gasoline dealership in a small town wants to estimate the average amount of gasoline that people in that town use in a 1-week period. The dealer asked 44 randomly selected customers to keep a diary of their gasoline ...A computer company that recently developed a new software product wanted to estimate the mean time taken to learn how to use this software by people who are somewhat familiar with computers. A random sample of 12 such ...A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing community service. How large a sample should the researcher select so that the estimate is within 1.2 ...When one is attempting to determine the required sample size for estimating a population mean, and the information on the population standard deviation is not available, it may be feasible to take a small preliminary sample ...The standard deviation for a population is σ = 6.30. A random sample selected from this population gave a mean equal to 81.90. The population is known to be normally distributed. a. Make a 99% confidence interval for µ ...Post your question

0