In: Statistics and Probability
Consider a sample of nine wait times measured in seconds at a
drive through coffee shop....
- Consider a sample of nine wait times measured in seconds at a
drive through coffee shop. The sample mean is 95 and the sample
standard deviation is 23.516. The population mean and standard
deviation are 100 and 20 respectively. (1) What is the size of the
sampling error in this case?
- (3) What is the probability that the average wait time would be
less than 80 seconds?
- (3) What is the probability that the average wait time would be
more than 109 seconds?
- (5) What is the probability that the average wait time would be
between 90 and 95 seconds?
- (3) What is the probability that a customer waits more than 65
seconds?