BUAL 2650 GUPTA EXAM 2 QUESTIONS & ANSWERS
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
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 - Answer -d. 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 - Answer -e. PInternet − Pstore > .10
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
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
Which one of the following is not an assumption about the residuals in a regression
model?
a. constant variance
b. independence
c. normality
d. variance of zero
e. mean of zero - Answer -d. variance of zero
The ________ regression method is used when the response variable is a qualitative or
a categorical variable.
a. quadratic
b. logistic
c. multiple
d. simple - Answer -b. logistic
Which of the following methods do we use to best fit the data in logistic regression?
a. Least square error
b. Maximum likelihood
c. Exponential decay
d. Both least square error and exponential decay - Answer -b. Maximum likelihood
A soccer player takes a shot on goal 15 times and scores a goal 3 of those attempts.
What are the odds of the soccer player scoring a goal?
a. 3/15
b. 5
c. 4
d. 3/12 - Answer -d. 3/12
CH 11 Quiz
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 Internet sales are more than 10 percent higher than store sales.
The null hypothesis would be
a. PInternet − Pstore = .10
b. PInternet − Pstore < .10
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
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 - Answer -d. 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 - Answer -e. PInternet − Pstore > .10
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
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
Which one of the following is not an assumption about the residuals in a regression
model?
a. constant variance
b. independence
c. normality
d. variance of zero
e. mean of zero - Answer -d. variance of zero
The ________ regression method is used when the response variable is a qualitative or
a categorical variable.
a. quadratic
b. logistic
c. multiple
d. simple - Answer -b. logistic
Which of the following methods do we use to best fit the data in logistic regression?
a. Least square error
b. Maximum likelihood
c. Exponential decay
d. Both least square error and exponential decay - Answer -b. Maximum likelihood
A soccer player takes a shot on goal 15 times and scores a goal 3 of those attempts.
What are the odds of the soccer player scoring a goal?
a. 3/15
b. 5
c. 4
d. 3/12 - Answer -d. 3/12
CH 11 Quiz
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 Internet sales are more than 10 percent higher than store sales.
The null hypothesis would be
a. PInternet − Pstore = .10
b. PInternet − Pstore < .10
