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How much do you typically pay, including tips, for a haircut? In a survey of 50...

How much do you typically pay, including tips, for a haircut? In a survey of 50 students in her class, one of the authors found the average amount paid for haircuts to be $45.68 and the standard deviation to be $39.95. The data are not strongly skewed.

1. ​Explain how you know from the sample average and sample standard deviation that the distribution of price of haircuts is not bell-shaped.
A.The sample standard deviation is very large compared to the mean.

B.The sample standard deviation is very small compared to the mean.  

2. Find the 95% confidence interval for the average amount paid for haircuts. Round to cents.

Math   Statistics-And-Probability   
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