The Labor Department issued the February 2009 state-by-state unemployment report, and it shows continued declines in the job market. These are the February 2009 unemployment rates for the 50 states and DC.
a. Construct a histogram.
b. Does the histogram suggest an approximately normal distribution?
c. Find the mean and standard deviation.
d. Find the percentage of data falling within the three different intervals about the mean and compare them to the empirical rule. Do the percentages and the empirical rule agree with your answer to part b? Explain.
e. Utilize one of the “testing for normality” Technology Instructions on pages 97–98. Compare the results with your answer to part d.

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