Intro Stats, Books a la Carte Edition (5th Edition)

5th Edition

ISBN: 9780134210285

Author: Richard D. De Veaux, Paul Velleman, David E. Bock

Publisher: PEARSON

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Textbook Question

Chapter 9, Problem 30E

Scottish hill races, men and women climbing The Scottish hill races considered in Exercises 14 and 29 are run by both men and women. We can combine the data to fit a single model for both. Here is one such model. The variable Climb*Sex is the product of the variable Climb and the indicator variable Sex, which is 0 for women and 1 for men.

Chapter 9, Problem 30E, Scottish hill races, men and women climbing The Scottish hill races considered in Exercises 14 and

a) What is the purpose of including the variable Climb*Sex in this model?
b) What does the coefficient of that variable mean in this model?

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Chapter 9, Problem 29E

Chapter 10.2, Problem 1JC

Chapter 9 Solutions

Intro Stats, Books a la Carte Edition (5th Edition)

Ch. 9.4 - Recall the regression example in Chapter 7 to...Ch. 9.4 - Prob. 2JC Ch. 9.4 - Prob. 3JC Ch. 9 - Housing prices The following regression model was...Ch. 9 - Candy sales A candy maker surveyed chocolate bars...Ch. 9 - Prob. 3E Ch. 9 - Prob. 4E Ch. 9 - Prob. 5E Ch. 9 - Prob. 6E Ch. 9 - Movie profits once more Look back at the...

Ch. 9 - Prob. 8E Ch. 9 - Prob. 9E Ch. 9 - More indicators For each of these potential...Ch. 9 - Interpretations A regression performed to predict...Ch. 9 - Prob. 12E Ch. 9 - Prob. 13E Ch. 9 - Scottish hill races Hill runningraces up and down...Ch. 9 - Prob. 15E Ch. 9 - Candy bars per serving: calories A student...Ch. 9 - Prob. 17E Ch. 9 - More hill races Here is the regression for the...Ch. 9 - Prob. 19E Ch. 9 - Home prices II Here are some diagnostic plots for...Ch. 9 - Admin performance The AFL-CIO has undertaken a...Ch. 9 - GPA and SATs A large section of Stat 101 was asked...Ch. 9 - Prob. 23E Ch. 9 - Breakfast cereals We saw in Chapter 7 that the...Ch. 9 - Breakfast cereals again We saw a model in Exercise...Ch. 9 - Prob. 26E Ch. 9 - Hand dexterity Researchers studied the dexterity...Ch. 9 - Candy bars with nuts The data on candy bars per...Ch. 9 - Scottish hill races, men and women The Scottish...Ch. 9 - Scottish hill races, men and women climbing The...

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Population Genetics In the study of population genetics, an important measure of inbreeding is the proportion of homozygous genotypesthat is, instances in which the two alleles carried at a particular site on an individuals chromosomes are both the same. For population in which blood-related individual mate, them is a higher than expected frequency of homozygous individuals. Examples of such populations include endangered or rare species, selectively bred breeds, and isolated populations. in general. the frequency of homozygous children from mating of blood-related parents is greater than that for children from unrelated parents Measured over a large number of generations, the proportion of heterozygous genotypesthat is, nonhomozygous genotypeschanges by a constant factor 1 from generation to generation. The factor 1 is a number between 0 and 1. If 1=0.75, for example then the proportion of heterozygous individuals in the population decreases by 25 in each generation In this case, after 10 generations, the proportion of heterozygous individuals in the population decreases by 94.37, since 0.7510=0.0563, or 5.63. In other words, 94.37 of the population is homozygous. For specific types of matings, the proportion of heterozygous genotypes can be related to that of previous generations and is found from an equation. For mating between siblings 1 can be determined as the largest value of for which 2=12+14. This equation comes from carefully accounting for the genotypes for the present generation the 2 term in terms of those previous two generations represented by for the parents generation and by the constant term of the grandparents generation. a Find both solutions to the quadratic equation above and identify which is 1 use a horizontal span of 1 to 1 in this exercise and the following exercise. b After 5 generations, what proportion of the population will be homozygous? c After 20 generations, what proportion of the population will be homozygous?

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Solution Summary: The author explains the purpose of including the predictor Climb*Sex in the regression model.

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Chapter 9 Solutions