BUAL 2650 Gupta Exam 2: Questions
with Correct Answers 2025-2026
In testing for the equality of means from two independent populations, if the hypothesis of eq
ual population means is rejected at α = .01, it will __________be rejected at α = .05
a. always
b. sometimes
c. never - CORRECT ANSWER -a. always
A new company is in the process of evaluating its customer service. The company offers two t
ypes of sales: (1) Internet sales and (2) store sales. The marketing research manager believes t
hat the Internet sales are more than 10 percent higher than store sales. The null hypothesis w
ould be
a. PInternet − Pstore > .10
b. PInternet − Pstore < .10
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore = .10 - CORRECT ANSWER -d. PInternet − Pstore ≤ .10
A new company is in the process of evaluating its customer service. The company offers two t
ypes of sales: (1) Internet sales and (2) store sales. The marketing research manager believes t
hat the Internet sales are more than 10 percent higher than store sales. The alternative hypot
hesis would be stated as
a. PInternet − Pstore > 0
b. PInternet − Pstore < 0
,c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore > .10 - CORRECT ANSWER -e. PInternet − Pstore > .10
If we are testing the hypothesis about the mean of a population of paired differences with sa
mples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is .
a. 19
b. 18
c. 9
d. 8
e. 10 - CORRECT ANSWER -c. 9
The measures the strength of the linear relationship between the dependent variabl
e and the independent variable.
a. correlation coefficient
b. distance value
c. Y-intercept
d. residual - CORRECT ANSWER -a. 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 - CORRECT ANSWER -d. −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
The null hypothesis of no linear relationship between the dependent variable and the indepen
dent 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. - CORRECT ANSWER -a. is rejected
The coefficient of determination measures the explained by the simple linear regres
sion model.
a. correlation
b. proportion of variation
c. standard error
d. mean square error - CORRECT ANSWER -b. proportion of variation
The of the simple linear regression model is the value of y when the mean value of
x is zero.
with Correct Answers 2025-2026
In testing for the equality of means from two independent populations, if the hypothesis of eq
ual population means is rejected at α = .01, it will __________be rejected at α = .05
a. always
b. sometimes
c. never - CORRECT ANSWER -a. always
A new company is in the process of evaluating its customer service. The company offers two t
ypes of sales: (1) Internet sales and (2) store sales. The marketing research manager believes t
hat the Internet sales are more than 10 percent higher than store sales. The null hypothesis w
ould be
a. PInternet − Pstore > .10
b. PInternet − Pstore < .10
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore = .10 - CORRECT ANSWER -d. PInternet − Pstore ≤ .10
A new company is in the process of evaluating its customer service. The company offers two t
ypes of sales: (1) Internet sales and (2) store sales. The marketing research manager believes t
hat the Internet sales are more than 10 percent higher than store sales. The alternative hypot
hesis would be stated as
a. PInternet − Pstore > 0
b. PInternet − Pstore < 0
,c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore > .10 - CORRECT ANSWER -e. PInternet − Pstore > .10
If we are testing the hypothesis about the mean of a population of paired differences with sa
mples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is .
a. 19
b. 18
c. 9
d. 8
e. 10 - CORRECT ANSWER -c. 9
The measures the strength of the linear relationship between the dependent variabl
e and the independent variable.
a. correlation coefficient
b. distance value
c. Y-intercept
d. residual - CORRECT ANSWER -a. 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 - CORRECT ANSWER -d. −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
The null hypothesis of no linear relationship between the dependent variable and the indepen
dent 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. - CORRECT ANSWER -a. is rejected
The coefficient of determination measures the explained by the simple linear regres
sion model.
a. correlation
b. proportion of variation
c. standard error
d. mean square error - CORRECT ANSWER -b. proportion of variation
The of the simple linear regression model is the value of y when the mean value of
x is zero.
