APPLIED STAT.IN BUS.+ECONOMICS

6th Edition

ISBN: 9781259957598

Author: DOANE

Publisher: RENT MCG

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Textbook Question

Chapter 12, Problem 13CR

(a) What is heteroscedasticity? Identify its two common forms. (b) What are its consequences? (c) How do we test for it?

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Chapter 12, Problem 12CR

Chapter 12, Problem 14CR

Chapter 12 Solutions

APPLIED STAT.IN BUS.+ECONOMICS

Ch. 12.1 - For each sample, do a test for zero correlation....Ch. 12.1 - Instructions for Exercises 12.2 and 12.3: (a) Make...Ch. 12.1 - Prob. 3SE Ch. 12.1 - Prob. 4SE Ch. 12.1 - Instructions for exercises 12.412.6: (a) Make a...Ch. 12.1 - Prob. 6SE Ch. 12.2 - (a) Interpret the slope of the fitted regression...Ch. 12.2 - (a) Interpret the slope of the fitted regression...Ch. 12.2 - Prob. 9SE Ch. 12.2 - (a) Interpret the slope of the fitted regression...

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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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(a) What is heteroscedasticity? Identify its two common forms. (b) What are its consequences? (c) How do we test for it?

Solution Summary: The author explains that heteroscedasticity occurs when the variance of the errors is different for each observation.

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Chapter 12 Solutions