Life expectancy is defined as the average number of years a person born in a given country is expected to live if mortality rates at each age were to remain steady in the future. The file LifeExpectancy contains data about female, male, and overall life expectancies for 183 countries around the world.

Answer (a) through (c) for each variable.

a. Compute the mean, median, first quartile, and third quartile.

b. Compute the range, interquartile range, variance, standard deviation, and coefficient of variation.

c. Construct a boxplot. Are the data skewed? If so, how?

d. Compute the coefficient of correlation between overall and female life expectancy, overall and male life expectancy, and female and male life expectancy.

e. Based on the results of (a) through (c), what conclusions can you reach about life expectancy around the world?

f. Based on (d), what conclusions can you reach about the relationship between the different life expectancies?