The national highway system is made up of interstate and non interstate highways. The Federal Highway Administration reported the number of miles of each type in each state. Listed is a random sample of 20.

Define €œratio I/N€ to be number of interstate miles divided by number of non interstate miles.
a. Inspect the data.What do you estimate the €œaverage€ ratio I/N to be?
b. Calculate the €œratio I/N€ for each of the 20 states listed.
c. Draw a histogram of the €œratio I/N.€
d. Calculate the mean €œratio I/N€ for the 20 states listed.
e. Use the total number of 20-state interstate and noninterstate miles to calculate the €œratio I/N€ for the combined 20 states.
f. Explain why the answers to parts d and e are not the same.
g. Calculate the standard deviation for the €œratio I/N€ for the 20 states listed.
h. Use the dataset indicated to answer the questions in parts b through g using all 51 values.

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Miles of Interstate and Noninterstate Highways by State State InterstateNoninterstate State Interstate Noninterstate NH FL ME Hi 235 1,471 367 589 TN 1073 NM 1,000 904 2,172 1,935 1,701 10,157 2,896 922 LA 292 3,233 1057 2,812 2,433 3,476 2,496 1,565 70 TX MT 1,192 912 GA 1,245 930 NC 1019 71 2,683 3,060 3,384 2,431 OH ,574 782 NY 1,674 482 AR 1,167 13 MN OK NE 197DC