BUAL 2650 GUPTA EXAM 2
QUESTIONS & ANSWERS 100%
CORRECT!!
In testing for the equality of means from two independent populations, if the
hypothesis of equal population means is rejected at α = .01, it will ________ be
rejected at α = .05
a. always
b. sometimes
c. never - ANSWERa. always
If we are testing the hypothesis about the mean of a population of paired differences
with samples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is
________.
a. 19
b. 18
c. 9
d. 8
e. 10 - ANSWERc. 9
The ________ measures the strength of the linear relationship between the
dependent variable and the independent variable.
a. correlation coefficient
b. distance value
c. Y-intercept
d. residual - ANSWERa. correlation coefficient
The correlation coefficient may assume any value between
a. 0 and 1
b. −∞ and ∞
c. 0 and 8
d. −1 and 1
e. −1 and 0 - ANSWERd. −1 and 1
The following results were obtained as part of a simple regression analysis.
r2 = .9162F
statistic from the F table = 3.59
Calculated value of F from the ANOVA table = 81.87
α = .05
p-value = .000
, A new company is in the process of evaluating its customer service. The company
offers two types of sales: (1) Internet sales and (2) store sales. The marketing
research manager believes that the Internet sales are more than 10 percent higher
than store sales. The null hypothesis would be
a. PInternet − Pstore > .10
b. PInternet − Pstore < .10
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore = .10 - ANSWERd. PInternet − Pstore ≤ .10
A new company is in the process of evaluating its customer service. The company
offers two types of sales: (1) Internet sales and (2) store sales. The marketing
research manager believes that the Internet sales are more than 10 percent higher
than store sales. The alternative hypothesis would be stated as
a. PInternet − Pstore > 0
b. PInternet − Pstore < 0
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore > .10 - ANSWERe. PInternet − Pstore > .10
The null hypothesis of no linear relationship between the dependent variable and the
independent variable
a. is rejected
b. cannot be tested with the given information
c. is not rejected
d. is not an appropriate null hypothesis for this situation. - ANSWERa. is rejected
The coefficient of determination measures the ________ explained by the simple
linear regression model.
a. correlation
b. proportion of variation
c. standard error
d. mean square error - ANSWERb. proportion of variation
The ________ of the simple linear regression model is the value of y when the mean
value of x is zero.
a. y-intercept
b. slope
c. independent variable
d. response variable - ANSWERa. y-intercept
In multiple regression analysis, the explained sum of squares divided by the total
sum of squares yields the __________.
QUESTIONS & ANSWERS 100%
CORRECT!!
In testing for the equality of means from two independent populations, if the
hypothesis of equal population means is rejected at α = .01, it will ________ be
rejected at α = .05
a. always
b. sometimes
c. never - ANSWERa. always
If we are testing the hypothesis about the mean of a population of paired differences
with samples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is
________.
a. 19
b. 18
c. 9
d. 8
e. 10 - ANSWERc. 9
The ________ measures the strength of the linear relationship between the
dependent variable and the independent variable.
a. correlation coefficient
b. distance value
c. Y-intercept
d. residual - ANSWERa. correlation coefficient
The correlation coefficient may assume any value between
a. 0 and 1
b. −∞ and ∞
c. 0 and 8
d. −1 and 1
e. −1 and 0 - ANSWERd. −1 and 1
The following results were obtained as part of a simple regression analysis.
r2 = .9162F
statistic from the F table = 3.59
Calculated value of F from the ANOVA table = 81.87
α = .05
p-value = .000
, A new company is in the process of evaluating its customer service. The company
offers two types of sales: (1) Internet sales and (2) store sales. The marketing
research manager believes that the Internet sales are more than 10 percent higher
than store sales. The null hypothesis would be
a. PInternet − Pstore > .10
b. PInternet − Pstore < .10
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore = .10 - ANSWERd. PInternet − Pstore ≤ .10
A new company is in the process of evaluating its customer service. The company
offers two types of sales: (1) Internet sales and (2) store sales. The marketing
research manager believes that the Internet sales are more than 10 percent higher
than store sales. The alternative hypothesis would be stated as
a. PInternet − Pstore > 0
b. PInternet − Pstore < 0
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore > .10 - ANSWERe. PInternet − Pstore > .10
The null hypothesis of no linear relationship between the dependent variable and the
independent variable
a. is rejected
b. cannot be tested with the given information
c. is not rejected
d. is not an appropriate null hypothesis for this situation. - ANSWERa. is rejected
The coefficient of determination measures the ________ explained by the simple
linear regression model.
a. correlation
b. proportion of variation
c. standard error
d. mean square error - ANSWERb. proportion of variation
The ________ of the simple linear regression model is the value of y when the mean
value of x is zero.
a. y-intercept
b. slope
c. independent variable
d. response variable - ANSWERa. y-intercept
In multiple regression analysis, the explained sum of squares divided by the total
sum of squares yields the __________.
