Boys' Heights Humans are, on average, taller today than they were 200 years ago. Today, the mean height of 14-year-old boys is about 65 in. Use the following relative frequency distribution of heights of a group of 14-year-old boys from the 19th century to answer the following questions. Heights of a Group of 19th-Century Boys, Age 14 Height (in inches) Percent of boys Under 50 0.2 50-54 7.0 55-59 46.0 60-64 41.0 65-69 5.8 SOURCE: Journal of the Anthropological Institute of Great Britain and Ireland a. What percent of the group of 19th-century boys was at least 65 in. tall? b. What is the probability that one of the 19th-century boys selected at random was at least 55 in. tall but less than 65 in. tall?

Boys' Heights Humans are, on average, taller today than they were 200 years ago. Today, the mean height of 14-year-old boys is about 65 in. Use the following relative frequency distribution of heights of a group of 14-year-old boys from the 19th century to answer the following questions. Heights of a Group of 19th-Century Boys, Age 14 Height (in inches) Percent of boys Under 50 0.2 50-54 7.0 55-59 46.0 60-64 41.0 65-69 5.8 SOURCE: Journal of the Anthropological Institute of Great Britain and Ireland a. What percent of the group of 19th-century boys was at least 65 in. tall? b. What is the probability that one of the 19th-century boys selected at random was at least 55 in. tall but less than 65 in. tall?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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