2.99 See Answer

Question: Refer to Table 12.11. Consider the


Refer to Table 12.11. Consider the variables “gender” and “college.”
a. Group the bivariate data for these two variables into a contingency table.
b. Determine the conditional distribution of gender within each college and the marginal distribution of gender.
c. Determine the conditional distribution of college within each gender and the marginal distribution of college.
d. Does an association exist between the variables “gender” and “college” for this population? Explain your answer.



Refer to Table 12.11. Consider the variables “gender-1



> We have presented a contingency table that gives a cross-classification of a random sample of values for two variables, x and y, of a population. For each exercise, perform the following tasks. a. Find the expected frequencies. Note: You will first need

> To compare the variation among the sample means to the variation within the samples, we use the ratio of MSTR to _____? This ratio is called the _____?

> We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 be satisfied. Note: Th

> A measure of variation within the samples is called the ____? The mathematical abbreviation for it is _____?

> We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 be satisfied. Note: Th

> A measure of variation among the sample means is called the ____ ? The mathematical abbreviation for it is ____ ?

> We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 be satisfied. Note: Th

> For a one-way ANOVA test, suppose that, in reality, the null hypothesis is false. Does that mean that no two of the populations have the same mean? If not, what does it mean?

> We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 be satisfied. Note: Th

> Explain the reason for the word variance in the phrase analysis of variance.

> From the Baseball Almanac website, we found the heights, in inches, of the players on the 2012 World Series runner-up Detroit Tigers baseball team. a. Construct a stem-and-leaf diagram of these data with five lines per stem. b. Why is it better to use fi

> We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 be satisfied. Note: Th

> If we define s = √MSE, of which parameter is s an estimate?

> Use Table V to find the required χ2-values. Illustrate your work graphically. For a χ2-curve with df = 10, determine a. χ20.05. b. χ20.025.

> One-way ANOVA is a procedure for comparing the means of several populations. It is the generalization of what procedure for comparing the means of two populations?

> We have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 be satisfied. Note: Th

> Find the required F -values. For an F-curve with df = (6, 10), find a. F0.05. b. F0.01. c. F0.025.

> Identify three techniques that can be tried as a remedy when one or more of the expected-frequency assumptions for a chi-square independence test are violated.

> How do we identify an F-distribution and its corresponding F-curve?

> Studies have shown that a positive association exists between educational level and annual salary; in other words, people with more education tend to make more money. a. Does this finding mean that more education causes a person to make more money? Expla

> We stated earlier that, if two variables are not associated, there is no point in looking for a causal relationship. Why is that so?

> From the Baseball Almanac website, we found the heights, in inches, of the players on the 2012 World Series–winning San Francisco Giants baseball team. a. Construct a stem-and-leaf diagram of these data with five lines per stem. b. Why is it better to us

> In the article, “One’s Sex, Sleep, and Posttraumatic Stress Disorder” (Biology of Sex Differences, Vol. 3, No. 29, pp. 1–7), I. Kobayashi et al. study the relationship between one’s sex, sleep patterns, and posttraumatic stress disorder (PTSD) after trau

> A chi-square independence test is to be conducted to decide whether an association exists between two variables of a population. One variable has six possible values, and the other variable has four. What is the degrees of freedom for the χ2-statistic?

> If no association exists between marital status and alcohol consumption, the proportion of married adults who abstain is the same as the proportion of all adults who abstain. Explain why that statement is true.

> Step 1 of Procedure 12.2 gives generic statements for the null and alternative hypotheses of a chi-square independence test. Use the terms statistically dependent and statistically independent, introduced on page 496, to restate those hypotheses.

> To decide whether two variables of a population are associated, we usually need to resort to inferential methods such as the chi-square independence test. Why?

> The U.S. Census Bureau publishes census data on the resident population of the United States in Current Population Survey. According to that document, 7.3% of male residents are in the age group 20–24 years. a. If no association exists between age group

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> Use Table V to find the required χ2-values. Illustrate your work graphically. For a χ2-curve with 22 degrees of freedom, determine the χ2-value that has area a. 0.01 to its right. b. 0.005 to its right.

> The U.S. Congress, Joint Committee on Printing, provides information on the composition of Congress in Congressional Directory. On the WeissStats site, we present data on party and class for the senators in the 113th Congress. a. Group the bivariate data

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> A golf ball manufacturer has determined that a newly developed process results in a ball that lasts roughly twice as long as a ball produced by the current process. To illustrate this advance graphically, she designs a brochure showing a “new” ball havin

> Refer to Exercise 12.50. a. Determine the conditional distribution of number of beds within each facility type. b. Does an association exist between facility type and number of beds for U.S. hospitals? Explain your answer. c. Determine the marginal distr

> Refer to Exercise 12.49. a. Find the conditional distribution of educational attainment within each type of prison facility. b. Does an association exist between educational attainment and type of prison facility for prisoners? Explain your answer. c. De

> For students below postsecondary, solve the following problems. a. Determine the conditional distribution of level for each gender. b. Determine the marginal distribution of level. c. Are the variables “gender” and “level” associated? Explain your answer

> For AIDS cases in the United States in 2011, solve the following problems: a. Find and interpret the conditional distributions of region by race. b. Find and interpret the marginal distribution of region. c. Are the variables “region” and “race” associat

> The U.S. Census Bureau publishes information about housing units in American Housing Survey for the United States. The following table cross-classifies single-unit occupied housing units by foundation type and tenure of occupier. The frequencies are in t

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> Use Table V to find the required χ2-values. Illustrate your work graphically. For a χ2-curve with 19 degrees of freedom, determine the χ2-value that has area a. 0.025 to its right. b. 0.01 to its right.

> In the article “Education and Correctional Populations” (Bureau of Justice Statistics Special Report, NCJ 195670), C. Harlow examined the educational attainment of prisoners by type of prison facility. The following contingency table was adapted from Tab

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> According to the Centers for Disease Control and Prevention publication HIV Surveillance Report, the number of AIDS cases in the United States in 2011, by region and race, is as shown in the following contingency table. a. How many cells does this contin

> Refer to Table 12.12. a. If you have not done Exercise 12.45, group the bivariate data for the two variables into a contingency table. b. Determine the conditional distribution of class level within each political party affiliation. c. Are the variables

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> Refer to Table 12.11. Consider the variables “class level” and “college.” a. Group the bivariate data for these two variables into a contingency table. b. Determine the conditional distribution of class level within each college and the marginal distribu

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2.99

See Answer