Intro Statistics - Student's Solution Manual

4th Edition

ISBN: 9780321825483

Author: DeVeaux

Publisher: PEARSON

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Chapter 22, Problem 5E

Customer ages An analyst at a local bank wonders if the age distribution of customers coming for service at his branch in town is the same as at the branch located near the mall. He selects 100 transactions at random from each branch and researches the age information for the associated customer. Here are the data:

Chapter 22, Problem 5E, Customer ages An analyst at a local bank wonders if the age distribution of customers coming for

a) What is the null hypothesis?
b) What type of test is this?
c) What are the expected numbers for each cell if the null hypothesis is true?
d) Find the χ² statistic.
e) How many degrees of freedom does it have?
f) Find the P-value.
g) What do you conclude?

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Chapter 22, Problem 4E

Chapter 22, Problem 6E

Chapter 22 Solutions

Intro Statistics - Student's Solution Manual

Ch. 22.3 - Why do we need the control group?Ch. 22.3 - Prob. 2JC Ch. 22.3 - Prob. 3JC Ch. 22.3 - Prob. 4JC Ch. 22.3 - Prob. 5JC Ch. 22.3 - Prob. 6JC Ch. 22.4 - Prob. 7JC Ch. 22.4 - Prob. 8JC Ch. 22.4 - Prob. 9JC Ch. 22 - Human births If there is no seasonal effect on...

Ch. 22 - Bank cards At a major credit card bank, the...Ch. 22 - Prob. 3E Ch. 22 - Prob. 4E Ch. 22 - Customer ages An analyst at a local bank wonders...Ch. 22 - Bank cards, once more A market researcher working...Ch. 22 - Human births, last time For the data in Exercise...Ch. 22 - Prob. 8E Ch. 22 - Prob. 9E Ch. 22 - Prob. 10E Ch. 22 - Prob. 11E Ch. 22 - Prob. 12E Ch. 22 - Dice After getting trounced by your little brother...Ch. 22 - MMs As noted in an earlier chapter, Mars Inc. says...Ch. 22 - Nuts A company says its premium mixture of nuts...Ch. 22 - Prob. 16E Ch. 22 - NYPD and race Census data for New York City...Ch. 22 - Violence against women In its study When Men...Ch. 22 - Fruit flies Offspring of certain fruit flies may...Ch. 22 - Prob. 20E Ch. 22 - Prob. 21E Ch. 22 - Lottery numbers The fairness of the South African...Ch. 22 - Prob. 23E Ch. 22 - Prob. 24E Ch. 22 - Childbirth, part 2 In Exercise 23, the table shows...Ch. 22 - Prob. 26E Ch. 22 - Prob. 27E Ch. 22 - Prob. 28E Ch. 22 - Prob. 29E Ch. 22 - Does your doctor know? (part 4) In Exercises 24,...Ch. 22 - Prob. 31E Ch. 22 - Prob. 32E Ch. 22 - 33. Titanic Here is a table we first saw in...Ch. 22 - NYPD The table below shows the rank attained by...Ch. 22 - Prob. 35E Ch. 22 - NYPD again Examine and comment on this table of...Ch. 22 - Cranberry juice Its common folk wisdom that...Ch. 22 - Prob. 38E Ch. 22 - Montana A poll conducted by the University of...Ch. 22 - 40. Fish diet Medical researchers followed 6272...Ch. 22 - Prob. 41E Ch. 22 - Working parents In April 2009, Gallup published...Ch. 22 - Grades Two different professors teach an...Ch. 22 - Full moon Some people believe that a full moon...Ch. 22 - Grades, again In some situations where the...Ch. 22 - Full moon, next phase In Exercise 44, you found...Ch. 22 - Racial steering A subtle form of racial...Ch. 22 - 48. Titanic, redux Newspaper headlines at the...Ch. 22 - Prob. 49E Ch. 22 - Prob. 50E Ch. 22 - Prob. 51E Ch. 22 - Education by age Use the survey results in 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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