Question: 1.Consider the following data sample for a variable X: 23 15 8 41 32 9 25 48 37 11 29 30 18 36 4 19

1.Consider the following data sample for a variable X:

23

15

8

41

32

9

25

48

37

11

29

30

18

36

4

19

A.Calculate the sample mean for X.

B.Calculate the sample standard deviation for X.

C.The sample mean and sample standard deviation are estimators. What are they estimators for?

D.Explain what it means to be an unbiased estimator in both formal and informal terms.

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