Probability and normal distribution

Reference no: EM1311724

George and Julia both work for the campus coffee shop. Sales are slow and management is considering letting one of them go. To decide which employee to keep, each is timed on 8 independent trials of making a double decaf skim milk latte. If the sample mean times differ by more than 12 seconds, the person with the larger sample mean will be let go: otherwise both will be kept. The standard deviation of the time it takes each person to make a double decaf skim latte is known to be 10 seconds and the preparation time is found to follow a normal distribution. If the mean times for both George and Julia are actually the same, what is the probability that George will be let go?

Reference no: EM1311724

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