BUAL 2650 GUPTA EXAM 2 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

BUAL 2650 GUPTA EXAM 2 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. 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
Answer:
a. always

Question:
2. 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 e .10
d. PInternet − Pstore d .10
e. PInternet − Pstore = .10
Answer:
d. PInternet − Pstore d .10

Question:
3. 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 e .10
d. PInternet − Pstore d .10
e. PInternet − Pstore > .10
Answer:
e. PInternet − Pstore > .10

Question:
4. 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
Answer:
c. 9

, Question:
5. 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
Answer:
a. correlation coefficient

Question:
6. 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
Answer:
d. −1 and 1

Question:
7. 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 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.
Answer:
a. is rejected

Question:
8. 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
Answer:
b. proportion of variation

Question:
9. 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