Question 1

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,suppose the managers of the brokerage firm want to construct both a 99% confidence interval estimate and a 99% prediction interval for X = 24.The confidence interval estimate would be the (wider or narrower)of the two intervals.

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 2

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the population slope was equal to 0.The value of the test statistic is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 3

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in had a positive impact on the amount of sales generated.For a test with a level of significance of 0.01,the null hypothesis should be rejected if the value of the test statistic is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 4

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,suppose the managers of the brokerage firm want to construct a 99% prediction interval for the sales made by a broker who has brought into the firm 18 new clients.The prediction interval is from _____ to _____ .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 5

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in did not affect the amount of sales generated.The value of the test statistic is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 6

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in had a positive impact on the amount of sales generated.The p-value of the test is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 7

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the population slope was equal to 0.The p-value of the test is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 8

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in had a positive impact on the amount of sales generated.At a level of significance of 0.01,the decision that should be made implies that the number of new
clients brought in _____ (had or did not have)a positive impact on the amount of sales generated.

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 9

SCENARIO 13-5
The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results:

-Referring to Scenario 13-5,the prediction for a quarter in which X = 120 is Y = .

Accepted Answer

The answer of SCENARIO 13-5
The managing partner of an advertising...

Question 10

SCENARIO 13-5
The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results:

-Referring to Scenario 13-5,the standard error of the estimated slope coefficient is .

Accepted Answer

The answer of SCENARIO 13-5
The managing partner of an advertising...

Question 11

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in had a positive impact on the amount of sales generated.At a level of significance of 0.01,the null hypothesis should be _____ (rejected or not rejected).

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 12

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the population slope was equal to 0.At a level of significance of 0.01,the null hypothesis should be _____ (rejected or not rejected).

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 13

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the population slope was equal to 0.For a test with a level of significance of 0.01,the null hypothesis should be rejected if the value of the test statistic is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 14

SCENARIO 13-5
The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results:

-Referring to Scenario 13-5,the standard error of the estimate is .

Accepted Answer

The answer of SCENARIO 13-5
The managing partner of an advertising...

Question 15

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the number of new clients brought in had a positive impact on the amount of sales generated.The value of the test statistic is .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 16

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis tha  the population slope was equal to 0.The denominator of the test statistic is sS1U1B1b1S1U1B0 .The value of S1U1B1b1S1U1B0 in this sample is______ .

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 17

SCENARIO 13-4
The managers of a brokerage firm are interested in finding out if the number of new clients a broker brings into the firm affects the sales generated by the broker.They sample 12 brokers and determine the number of new clients they have enrolled in the last year and their sales amounts in thousands of dollars.These data are presented in the table that follows.
 
-Referring to Scenario 13-4,the managers of the brokerage firm wanted to test the hypothesis that the population slope was equal to 0.At a level of significance of 0.01,the decision that should be
made implies that _____ (there is a or there is no)linear dependent relationship between the independent and dependent variables.

Accepted Answer

The answer of SCENARIO 13-4
The managers of a brokerage firm...

Question 18

SCENARIO 13-5
The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results:

-Referring to Scenario 13-5,the estimates of the Y-intercept and slope are _____ and _____ ,respectively.

Accepted Answer

The answer of SCENARIO 13-5
The managing partner of an advertising...

Question 19

SCENARIO 13-5
The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results:

-Referring to Scenario 13-5,the coefficient of determination is .

Accepted Answer

The answer of SCENARIO 13-5
The managing partner of an advertising...

Question 20

SCENARIO 13-5
The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results:

-Referring to Scenario 13-5,the value of the quantity that the least squares regression line minimizes is .

Accepted Answer

The answer of SCENARIO 13-5
The managing partner of an advertising...

Quiz 13: Simple Linear Regression

SCENARIO 13-5 The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results: -Referring to Scenario 13-5,the standard error of the estimate is .

SCENARIO 13-5 The managing partner of an advertising agency believes that his company's sales are related to the industry sales.He uses Microsoft Excel to analyze the last 4 years of quarterly data with the following results: -Referring to Scenario 13-5,the coefficient of determination is .