Question
My barber claims that, on average, it takes him less than 20 minutes to give someone a haircut. A random sample of 9 haircuts yielded
My barber claims that, on average, it takes him less than 20 minutes to give someone a haircut. A random sample of 9 haircuts yielded a mean of 17.25 minutes. Assume haircut times are normally distributed with a population standard deviation of 3.5 minutes. Is there sufficient evidence to support my barber's claim?
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College Geometry A Discovery Approach
Authors: David Kay
2nd Edition
0321830954, 9780321830951
