# Question

Better Roads magazine reported the percentage of interstate and state-owned bridges that were structurally deficient or functionally obsolete (%SD/FO) for each U.S. state in 2003. (Percentages are expressed in decimal form [e.g., 0.20 _ 20%].)

a. Construct a histogram.

b. Does the variable “%SD/FO” appear to have an approximately normal distribution?

c. Calculate the mean.

d. Find the median.

e. Find the range.

f. Find the standard deviation.

a. Construct a histogram.

b. Does the variable “%SD/FO” appear to have an approximately normal distribution?

c. Calculate the mean.

d. Find the median.

e. Find the range.

f. Find the standard deviation.

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