Download BUAL 2650 Exam 2 – Gupta 2025 Edition with Correct Solutions for Auburn University and more Exams Statistics in PDF only on Docsity!
BUAL 2650 GUPTA EXAM 2 2025 EXAM
WITH CORRECT SOLUTIONS.
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 =.
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 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 >.
b. PInternet − Pstore <.
c. PInternet − Pstore ≥.
d. PInternet − Pstore ≤.
e. PInternet − Pstore = .10 - correct answer- d. PInternet − Pstore ≤.
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 ≥.
d. PInternet − Pstore ≤.
e. PInternet − Pstore > .10 - correct answer- e. PInternet − Pstore >.
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 - correct 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 - correct answer- a. correlation coefficient
explained by the simple linear regression 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.
a. y-intercept
b. slope
c. independent variable
d. response variable - correct answer- a. y-intercept
In Multiple Regression Analysis, The Explained Sum Of Squares Divided By The Total Sum Of Squares Yields The .
a. standard error
b. F statistic
c. R
d. adjusted R2 or R−
e. t statistic - correct answer- c. R
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 - correct 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 - correct 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 - correct answer-
b. Maximum likelihood
Distributed Populations Using Independent Random Samples With Equal Variances, The Correct Test Statistic To Use Is The
a. None of the other choices is correct
b. F statistic
c. chi-square statistic
d. z statistic
e. t statistic - correct answer- e. t statistic
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 The Internet Sales Are More Than 10 Percent Higher Than Store Sales. The Alternative Hypothesis For This Problem Would Be Stated As
a. PInternet − Pstore >.
b. PInternet − Pstore > 0
c. PInternet − Pstore ≤.
d. PInternet − Pstore < 0
e. PInternet − Pstore ≥ .10 - correct answer- a. PInternet − Pstore >.
CH 11 Quiz When Testing The Difference Between Two Population Proportions Using Large Independent Random Samples, The Test Statistic Is Used.
a. None of the other choices is correct
b. t
c. F
d. z
e. chi-square - correct answer- d. z
CH 11 Quiz If We Are Testing The Difference Between The Means Of Two Normally Distributed Independent Populations With Samples of n1= 10, n2 = 10, The Degrees Of Freedom For The t statistic is .
a. 18
b. 9
c. 19
d. 8
e. 20 - correct answer- a. 18
CH 14 Quiz An Accountant Wishes To Predict Direct Labor Cost (y) On The Basis Of The Batch Size (x) Of A Product Produced In A Job Shop. Data For 12 Production Runs Are Given In The Table Below, Along With The Excel Output From Fitting A Least-Squares Regression Line To The Data. LaborCost = 18.488 + 10.146 * Bsize
a. never
b. sometimes
c. always
d. never - correct answer- c. always
CH 14 Quiz All Of The Following Are Assumptions Of The Error Terms In The Simple Linear Regression Model Except
a. Error Terms Have A Constant Variance
b. Error Terms Are Dependent On Each Other
c. Error Terms Have A Mean Of Zero
d. Errors Are Normally Distributed - Correct Answer- B. Error
Terms Are Dependent On Each Other CH 14 Quiz The Measures The Strength Of The Linear Relationship Between The Dependent Variable And The Independent Variable.
a. Residual
b. correlation coefficient
c. distance value
d. Y-intercept - correct answer- b. correlation coefficient
CH 14 Quiz In Simple Regression Analysis, The Quantity That Gives The Amount By Which Y(dependent variable) Changes For A Unit Change In X (independent variable) Is Called The .
a. slope of the regression line
b. correlation coefficient
c. coefficient of determination
d. standard error
e. y-intercept of the regression line - correct answer- a. slope of the
regression line CH 14 Quiz A Simple Regression Analysis With 20 Observations Would Yield Degrees Of Freedom Error And Of Freedom Total.
a. 18, 20
b. 18, 19
c. 1, 20
d. 1, 19
e. 19, 20 - correct answer- b. 18, 19
b. Is Not Rejected
c. Is Rejected
d. Is Not An Appropriate Null Hypothesis For This Situation -
Correct Answer- C. Is Rejected CH 14 Quiz In Simple Regression Analysis, If The Correlation Coefficient Is A Positive Value, Then.
a. The Slope Of The Regression Line Must Also Be Positive
b. The Coefficient Of Determination Can Be Either Positive Or
Negative, Depending On The Value Of The Slope
c. The Least Squares Regression Equation Could Have Either A
Positive Or A Negative Slope
d. The Standard Error Of Estimate Can Have Either A Positive Or A
Negative Value
e. The Y-Intercept Must Also Be A Positive Value - Correct
Answer- A. The Slope Of The Regression Line Must Also Be Positive CH 15 Quiz DF SS MS F P 2 23.2259 11.6129 27.21 0. 5 2.1341 0. 7 25. Report The Total Variation
a. 23.
b. 25.
c. 11.
d. 2.1341 - correct answer- b. 25.
CH 15 Quiz DF SS MS F P 2 23.2259 11.6129 27.21 0. 5 2.1341 0. 7 25. Report The Explained Variation
a. 11.
b. 25.
c. 23.
d. 2.1341 - correct answer- c. 23.
CH 15 Quiz DF SS MS F P 2 23.2259 11.6129 27.21 0. 5 2.1341 0. 7 25.
Use the F(model) Statistic And The Appropriate Critical Value To Test The Significance Of The Linear Regression Model Under Consideration By Setting α equal to .05.
a. Sometimes reject Ho
b. Fail to reject Ho
c. Do not reject Ho
d. Reject Ho - correct answer- d. Reject Ho
CH 16 Quiz The Regression Method Is Used When The Response Variable Is A Qualitative Or A Categorical Variable.
a. multiple
b. quadratic
c. simple
d. logistic - correct answer- d. logistic
CH 16 Quiz Which Of The Following Methods Do We Use To Best Fit The Data In Logistic Regression?
a. Exponential Decay
b. Least Square Error
c. Both Least Square Error And Exponential Decay
d. Maximum Likelihood - Correct Answer- D. Maximum Likelihood
CH 16 Quiz In Logistic Regression,.
a. The Dependent Variable Is Divided Into Two Equal
Subcategories
b. The Dependent Variable Is Categorical
c. The Dependent Variable Is Continuous
d. There Is No Dependent Variable - Correct Answer- B. The
Dependent Variable Is Categorical. CH 16 Quiz The Probability Of A New Employee Passing A Test Is .20. What Are The Odds Of The Employee Passing The Test?
a..
b..
c..
d. .20 - correct answer- a..
CH 16 Quiz
a. Minitab regression
b. Deviance
c. Pearson
d. Hosmer-Lemeshow - correct answer- a. Minitab regression
