MKT Research Chapter 15
Several dummy variables can be included in a regression model.
true
If the regression equation is: Y = -4.2 + 3.6 X, then the expected score for Y when X is 4 would be ____. a. -18.6 b. 10.2 c. 18.6 d. 20.2
10.2
Consider the regression equation: Y = 98.3 +.35X1 + 22.3X2, the predicted value for Y when X1 = 3 and X2 = 5 is ____. a. 67.23 b. 98.34 c. 118.45 d. 210.85
210.85
Suppose that you are using a 9-point rating scale to compare men who have an annual income over $50,000 (Group 1) with men who have an annual income less than or equal to $50,000 (Group 2) with regard to their assessment of a new product. There are forty men in Group 1 and they have a mean of 7 and a standard deviation of 2.5, while the 35 men in Group 2 have a mean of 5 and a standard deviation of 1.4. What is the approximate value of t using the t-test? a. 3.43 b. 4.19 c. 5.64 d. There is not enough information to determine this.
4.19
In a brand awareness study, 25 of a group of 35 males identify the brand correctly and 15 of a group of 35 females identify this brand correctly. The chi-square value for this study is approximately ____. a. 3.26 b. 4.15 c. 5.84 d. 7.92
5.84
A study compares the means of two groups in which there are 45 males in Group 1 and 37 females in Group 2. The degrees of freedom for this study when using the t-test for the difference between means is ____. a. 74 b. 80 c. 82 d. 160
80
If a researcher is interested in whether adult males purchase a product more frequently than adult females, univariate statistics would be used in the analysis of data (True/false)
False
The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30. (true/false)
False
The degrees of freedom are calculated as df = n - 1 when using the t-test for comparing two means, where n = n1 + n2. (true/false)
False
The independent samples t-test tests the differences between means from no more than four independent samples or groups. (true/false)
False
To use the chi-square test, both variables in a 2 x 2 contingency table must be measured on a ratio scale. (True/false)
False
Cross-tabulation tables typically provide an easy, intuitive way of understanding data. (True/false)
True
One way to test the significance of the relationship shown in a contingency tables is by means of the chi-square test. (True/false)
True
The chi-square test involves comparison of the observed frequencies of the groups with the expected frequencies of the groups. (True/false)
True
The chi-square test tests the significance of the relationship shown in an R X C contingency table in which R stands for row and C stands for column. (True/false)
True
When the difference between two groups is measured, bivariate statistics are used (True/false)
True
In the regression equation, Y = a + b X, Y is the ____. a. dependent variable b. slope c. independent variable d. intercept
dependent variable
A variable that has two distinct levels that are coded as either zero or one is called a(n) ____. a. regression variable b. dummy variable c. MANOVA variable d. ANOVA variable
dummy variable
A Z-test for differences of proportions requires a sample size greater than 100. (true/false)
false
A pooled estimate of the standard error is a poorer estimate of the standard error than one based on the variance from either sample. (true/false)
false
If the purpose of the regression analysis is forecasting, then standardized regression estimates are most appropriate
false
In a regression equation, the slope of the line, b, is the change in X that is due to a corresponding change of one unit of Y.
false
In most business research, the estimate of a in a regression equation is most important.
false
In multiple regression, dummy variables are those that have no effect on the dependent variable.
false
In regression, the standardized Y-intercept term is always 1.
false
Multiple regression analysis includes a single independent variable but several dependent variables.
false
Multivariate dependence techniques are variants of the ____, which is a way of modeling some process based on how different variables cause fluctuations from the average dependent variable. a. ordinary linear model (OLM) b. weighted average model (WAM) c. general linear model (GLM) d. metric scaling model (MSM)
general linear model (GLM)
In regression analysis, the symbol X is commonly used for the ____ variable, and the symbol Y is commonly used for the ____ variable. a. dependent; moderating b. independent; dependent c. dependent; independent d. independent; moderating
independent; dependent
When the on-time performance of airlines is used to predict the number of customer complaints in a regression equation, on-time performance is the ____ variable and the number of customer complaints is the ____ variable. a. independent; dependent b. dependent; dependent c. dependent; independent d. independent; predictor
independent; dependent
In comparing the difference of the means between two groups, the null hypothesis can also be stated as ____. a. m1 - m2 = 0 b. m1 + m2 = 0 c. m1 x m2 = 0 d. m1 / m2 = 0
m1 - m2 = 0
What is another form of the alternative hypothesis when testing the difference between the means of the two groups? a. m1 - m2 = 0 b. m1 - m2 =/ 0 c. m1 - m2 = 2 d. m1 - m2 =/ 2
m1 - m2 =/ 0
In using the t-test to compare the means of two groups, the alternative hypothesis is typically stated as ____. a. m1 =/ m2 b. m1 = m2 c. m1 - m2 = 2 d. m1 + m2 = 1
m1 =/ m2
Jamal is analyzing data and his current focus centers on how strongly interrelated the independent variables in his model are. Jamal is concerned about ____. a. multicollinearity b. MANOVA c. degrees of freedom d. convergence
multicollinearity
Which analysis is portrayed by the equation: Y = bo + b1X1 + b2X2 + b3X3... + bnXn? a. simple regression b. multiple regression c. chi-square d. factor analysis
multiple regression
When a researcher is attempting to predict sales volume by using building permits, amount of advertising, and the income levels of residents, the researcher is most likely using ____. a. univariate analysis b. a chi-square analysis c. multiple regression analysis d. factor analysis
multiple regression analysis
Which type of analysis involves three or more variables? a. univariate statistical analysis b. bivariate statistical analysis c. multivariate statistical analysis d. polyvariate statistical analysis
multivariate statistical analysis
In the formula df = n - k, k represents the ____. a. number of observations b. degrees of freedom of the denominator c. number of independent variables d. sample size
number of independent variables
In the regression equation, Y = a + b X , b is the ____. a. y-intercept b. independent variable c. slope of the regression line d. dependent variable
slope of the regression line
Which value provides a common metric allowing regression results to be compared to one another, regardless of what the original scale range may have been? a. standardized regression coefficient (b) b. c2 c. coefficient of determination (R2) d. raw parameter estimates
standardized regression
In a regression equation, the beta coefficients indicate the effect on the dependent variable of a 1-unit increase in any of the independent variables.
true
In multiple regression, the dependent variable must be continuous and interval-scaled.
true
In regression analysis, the equation of a straight line is Y = a + b X.
true
Mulitvariate dependence techniques are variants of the general linear model (GLM).
true
Multivariate statistical analysis permits the researcher to consider more than one dependent variable at the same time.
true
The null hypothesis for an ANOVA test comparing the means of three groups is: m1 = m2 = m3.
true
A researcher hypothesizes that males and females differ with respect to attitude toward sports sponsorships. To investigate this hypothesis that these two groups' attitudes differ, the researcher will use a ____. a. bivariate test of differences b. univariate test of differences c. multivariate test of differences d. cluster analysis
univariate test of differences
Which of the following is computed by most regression programs and provides an indication of how much multicollinearity exists among a set of independent variables? a. x2 b. b c. collinear coefficient d. variance inflation factor (VIF)
variance inflation factor (VIF)
The formula given below represents the method for calculating the ____. a. Z-test b. F-test c. x2 test d. a
x2 test
In the regression equation, Y = a + b X, a is the symbol for the ____. a. slope of the regression line b. y-intercept of the regression line c. dependent variable d. independent variable
y-intercept of the regression line
Consider this regression equation: Y = 24.35 - 14.2 X. Here, 24.35 is the ____, and -14.2 is the ____. a. slope; y-intercept b. independent variable; slope c. dependent variable; y-intercept d. y-intercept; slope
y-intercept; slope
How many degrees of freedom are there in a four-cell chi-square test? a. (R + 1) b. (R - 1) c. (R - 1)(C - 1) d. R(C - 1)
(R - 1)(C - 1)
The statistical significance of a regression model is determined using the ____. a. t-test b. x2 c. F-test d. Z-test
F-test
The equation, Y = a + b X, is the equation for the ____. a. coefficient of determination b. correlation coefficient c. least-squares regression line d. F-test
least-squares regression line
The formula for the chi-square test uses ____. a. observed and expected frequencies b. observed and expected percentages c. the two sample means d. the two sample standard deviations
observed and expected frequencies
In using the Z-test for comparing two proportions, the null hypothesis is typically stated as ____. a. p1 = p2. b. p1 =/ p2. c. p1 x p2 = 1 d. p1 - p2 = 1
p1 = p2.