The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in t
he sample to check out was 3.1 minutes with a standard deviation of 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. The p-value is
1 answer:
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Any further questions about this? Or how I got my answer?
For any values less than -3, the answer is undefined, because then you have a negative value for √x+3
