Below is the data sample she obtains (units are $/gallon).

3.02

3.02

3.37

3.1

3.13

3.22

3.37

2.95

3.47

3.36

3.44

3.39

2.95

3.11

3.25

3.4

3.41

3.01

3.44

3.43

3.17

3.37

2.96

3.34

3.01

Answer ALL of the following four questions.

(1) Calculate the mean, median and standard deviation of the sample?

(2) What is the 95% confidence interval for the average price range, based on the above sample?

(3) Do you see any issues with the 95% confidence interval calculated in part (C)?

(4) Do you think she has obtained a true probability simple random sample? Explain.