Humans are, on average, taller today than they were 200 years ago. Today, the mean height of 14-year-old boys is about 65 inches. 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. b. Find a, the slope of the least-squares line, and b, the y-intercepts of the least-squares line.DULYAve Daria CollegeCOLLEGE OF INFORMATION TECHNOLOGYHEI Unique Institutional Identifier: 09077WEEKLY EXAM 7Instruction: Read the instruction carefully. Show your solutions legibly on a separate sheet of paper.1. Problem Solving1. Humans are, on average, taller today than they were 200 years ago. Today, the mean height of14-year-old boys is about 65 inches. Use the following relative frequency distribution of heightsof a group of 14-ycar-old boys from the 19th century to answer the following questions.Height of a Group of 19h-Centruy Boys, Age 14Height (in inches)Under 5050-Percent of boys0.2547.055- 5946.060 - 6441.065 - 695,8Source: Journal of the Anthropological Institute of Great Britain and Irelanda. What percent of the group of 19"-century boys was at least 65 inches tall?b. What is the probability that one of the 19h-century boys selected at random was at least55 inches tall but less than 65 inches tall?Use the Empirical Rule to answer each question.2. In a normal distribution, what percent of the data liea. within 2 standard deviation of the mean?b. more than I standard deviation above the mean?c. between I standard deviation below the mean and 2 standard deviations about the mean?3. A biologist found the wingspan of a group of monarch butterflies to be normally distributed, witha mean of 52.2 mm and a standard deviation of 2.3 mm. What percent of the butterflies had awingspana less than 219?b. between 190 and 225?4. Given the bivariate data:23.3a. Draw a scatter diagram for the data.C. Find, to the nearest hundredth, the linear correlation cocfficient.164

The given data: Height (in inches) Percent of boys Under 50 0.2 50-54 7.0 55-59 46.0…

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erage, taller today than they were 200 years ago. Today, the mean height of

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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