Ch. 11: BUS Statistics
The welfare program known as TANF is
Temporary Assistance for Needy Families.
Which of the following is a potential disadvantage of dependent samples?
The degrees of freedom for paired samples are half of of what they would be for unpaired samples
Which two of the following are assumptions made when using a two sample test of means with equal standard deviations?
The sampling distribution of the difference of means is a t-distribution. The populations have equal but unknown standard deviations; therefore, we "pool" the sample standard deviations.
Social insurance programs essentially fulfill which of the following functions?
They partially replace lost income due to retirement, disability, or temporary unemployment
The purpose of the _____________ income tax credit is to offset Social Security taxes paid by low-wage earners, thus preventing them from being "taxed into poverty."
earned
Social insurance programs are mainly financed out of
federal payroll taxes.
Public assistance programs are funded by
general tax revenues.
Identify the formula for the test statistic for a two sample test of means with unknown but equal σ's.
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Identify the formula for the variance of the distribution of differences in means, σ's known.
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Place the following steps in the correct order to find the test statistic and then evaluate a two sample test of means with population variances equal but unknown.
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The formula for the test statistic used in a test of paired samples is: t = dsd/√ndsd/n. Match the variables to their descriptions.
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The formula for the test statistic used for a two sample test of means where the population variances are unknown and unequal is: t = X1−X2√s12/n1+s22/n2X1-X2s12/n1+s22/n2 Match the variables to their description.
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The variance of the distribution of differences in means between two independent samples is found using this formula: σ2X1−X2σ2X1-X2=σ12n1σ12n1 + σ22n2σ22n2 Match the variables to their description.
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We are doing a two sample test of means, and assume that the population variances are equal. We have the following data: Sample A: nA= 8, sA= 4 Sample B: nB= 9, sB= 3 Find the pooled variance.
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Which of the following is the formula for the test statistic used in a test of paired samples?
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Which of the following is a public assistance or welfare program?
Earned-income tax credit
Who pays the taxes that finance the Social Security program?
Employers Employees
Which of the following provides most of the funds for public assistance programs in the United States?
Federal Government
Financing for public assistance programs comes from which of the following?
Federal and state funding General tax revenues
An real estate agent is comparing the average price for 3-bedroom, 2-bath homes in Chicago and Denver. Samples from each city provide the following data: Chicago: XXC = $148,000, σC= $12,000, nC= 20 Denver: XD=$142,500,σDXD=$142,500,σD= $10,000, nD= 18 Suppose he is conducting a test to see if there evidence to prove Chicago has a higher average price than Denver. State the proper null and alternate hypothesis.
H0: μC≤ μD H1: μC > μD
The federal program that provides medical benefits to people covered by the basic welfare programs is
Medicaid
_______________ is the federal program that provides medical benefits to people covered by the SSI and TANF programs.
Medicaid
Which programs provide benefits to people who are unable to earn income because of permanent disabilities, or who have no income and have dependent children?
Public assistance programs
The ______, formerly known as the food-stamp program is a federal welfare program that permits eligible low-income persons to obtain vouchers that can be used to buy food.
SNAP
The federal welfare program that provides a uniform minimum income for the aged, blind, and disabled who are unable to work and who do not qualify for Social Security aid is called:
Supplemental Security Income
The basic welfare program for low-income families in the US is the
TANF
Which of the following are examples of public assistance programs?
Temporary Assistance for Needy Families (TANF) Food-stamp program Supplemental Security Income program
Suppose you would like to test to see if there is a difference in the starting salaries for accounting graduates and finance graduates. Suppose you matched up 16 recent accounting and finance graduates according to GPA, work experience, location of job, and other factors. If you conducted a test using H0: μd=0 and an α=0.05, what would be the critical value for the upper tail?
t = 2.131
Suppose you are doing a two sample test of means, and assume that the population variances are equal. We have the following data: Sample 1: n1= 21, XX1 = 15, s1= 3 Sample 2: n2= 28, XX2 = 11, s2= 4 Find the test statistic.
t = 3.840
The following are the main social insurance programs, except
the food stamp program.
The federal welfare program designed to provide all low-income Americans with a "nutritionally adequate diet" is
the food-stamp program.
________________ compensation is a federal-state social insurance program that makes income available to workers who lose their jobs.
unemployment
Public assistance programs are commonly called
welfare programs.
