The amount of time a bank teller spends with each costumer has a population mean , Mean=3.10 minutes and standard deviation=0.40 minute. If you select a random sample of 16 costumers,
A) What is the probability that the mean time spent per customer is at least 3minutes?
b) There is an 85% chance that the sample mean is below how many minutes?
c) If you select a random sample of 64 customers, there is 85% chance that the sample mean is below how many minutes?

Question

The amount of time a bank teller spends with each costumer has a population mean , Mean=3.10 minutes and standard deviation=0.40 minute. If you select a random sample of 16 costumers, 
A) What is the probability that the mean time spent per customer is at least 3minutes?
b) There is an 85% chance that the sample mean is below how many minutes?
c) If you select a random sample of 64 customers, there is 85% chance that the sample mean is below how many minutes?

anonymous · Answer

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