Here are the data on wolf upper jaws from Practice Problem 5, in centimeters. There are 35 individuals in this data set. Assume that this variable is normally distributed.

a. Draw a graph to confirm that the frequency distribution of the data is roughly bell shaped.

b. What are the sample mean and the standard error of the mean for this data set? Provide an interpretation of this standard error.

c. Find the 95% confidence interval for the mean.

d. Find the 99% confidence interval for the variance.

e. Find the 99% confidence interval for the standard deviation.

Data from problem 5

Measurements of the distance between the canine tooth and last molar for 35 wolf upper jaws were made by a researcher. He found the 95% confidence interval for the mean to be 10.17 cm

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10.2.10.2, 10.4.10.4, 9.9.9.9, 10.7,10.7, 10.3.10.3, 9.7.9.7, 10.3,10.3, 10.7, 10.7, 10.1,10.1, 10.6,10.6, 10.3,10.3, 10.0,10.0, 10.2.10.2, 10.1.10.1, 10.3. 10.3, 9.9.9.9, 9.7,9.7, 10.6,10.6, 10.4,10.4, 10.1,10.1, 10.6.10.6, 10.3,10.3, 10.3,10.3, 10.5,10.5, 10.2.10.2, 10.2.10.2, 10.5,10.5, 10.1.10.1, 11.2.11.2, 10.5,10.5, 10.3,10.3, 10.0,10.0, 10.3.10.3, 10.7,10.7, 11.111.1