Refer to the relative frequency histogram of life expectancy in 223 countries ar

Question

Refer to the relative frequency histogram of life expectancy in 223 countries around the world in the figure belovw 0.30 0.25 0.20 0.15 0.10 0.05 30 40 50 60 708090 Life Expectancy Life expectancies of people by country. [Source: www.cia gorMibrary/ publications the-world-factbook/ rankorder/2102rank.brml. a. Estimate to the nearest percent the proportion of countries with a life expectancy of less than 65 years 23 The proportion of countries with a life expectancy of less than 65 years is about b. Estimate to the nearest integer the number of countries with a life expectancy of less than 65 years 51 The number of countries with a life expectancy of less than 65 years is about c. Describe the shape, center, and spread of this distribution The shape of this distribution is skewed countries 75 and 85 60and 75 years left smaller # toward the values. The median is between and the middle 50% of the life expectancies are between

Explanation / Answer

a) 0+0.01+0.05+0.04+0.04+0.07+0.07 =0.28 or 28%

b) Number of countries = 28/100*233= 65 countires.

c) median is between 70 and 75 as the cuulative freuency becomes 50% in the 70 to 75 range.

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