) The following data represents the age (in weeks) at which babies first crawl based on a survey of 12 mothers conducted by Essential Baby:   - 52 - 30 - 44 - 35 - 47 - 37 - 56 - 26 - 39 - 26 - 39 - 28 a. Find the mean of the sample. b. Find the standard deviation of the sample. c. Construct a 95% Confidence Interval estimate for the mean age at which a baby first crawls.  (Assume the data comes from a normal distribution.)

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3.) The following data represents the age (in weeks) at which babies first crawl based on a survey of 12 mothers conducted by Essential Baby:

 

- 52

- 30

- 44

- 35

- 47

- 37

- 56

- 26

- 39

- 26

- 39

- 28

a. Find the mean of the sample.




b. Find the standard deviation of the sample.




c. Construct a 95% Confidence Interval estimate for the mean age at which a baby first crawls.  (Assume the data comes from a normal distribution.)

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