Homework Answers
1) B. Since the company wants to predict units from advertising expenditure, the explanatory variable is advertising expenditure.
2) B. Since the company wants to predict units from the advertising expenditure, the response variable is units.
3) B. Since advertising expenditure is the explanatory variable it should be plotted on x axis.
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A company that relies on Internet-based advertising linked to key websites visited wants to understand the...
A consumer products company wants to measure the effectiveness of different types of advertising media in...
A consumer products company wants to measure the effectiveness of different types of advertising media in the promotion of its products. Specially, two types of advertising media are to be considered: radio and television advertising and newspaper advertising (including the cost of discount coupons). A sample of 22 cities with approximately equal population is selected for study during a test period of one month. Each city is allocated a specific expenditure level both for radio and television advertising and for newspaper advertising. The...
Q.19 An auto insurance company wants to predict client claims from the amount of premium paid...
Q.19 An auto insurance company wants to predict client claims from the amount of premium paid on each policy. Which of the following variables should be the explanatory variable in such a study? a. Amount of claim b. Deductible c. Limits per coverage d. Policy premium e. Insufficient information
A large corporation is interested in whether advertising on TV has had an effect on sales...
A large
corporation is interested in whether advertising on TV has had an
effect on sales of their products. Data have been collected in
?=20n=20
different markets on the spend on TV advertising (?x,
measured in thousands of dollars) and product sales (?y,
measured in thousands of units).
The following
are useful summaries of the data:
A large corporation is interested in whether advertising on TV has had an effect on sales of their product: Data have been collected in...
Following are age and price data for 8 randomly selected ambulances between 1 and 6 years...
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6). a.b.b. The data in the table to the right are based on the results of...
6).
a.b.b.
The data in the table to the right are based on the results of a survey comparing the commute time of adults to their score on a well-being test. Complete parts (a) through (d) below. Click the icon to view the critical values for the correlation coefficient. Commute Time (in minutes) Well-Being Score 5 69.5 16 68.9 27 67.5 34 67.4 47 66.9 68 65.9 97 63.9 (a) Which variable is likely the explanatory variable and which is...
Researchers used data on the average reading and math scores on a national test for each...
Researchers used data on the average reading and math scores on a national test for each state in a nation to develop a regression equation. The rearchers let the explanatory variable x be the average reading score and the response variable y be the average math score. The regression equation is y = 18.7 +0.953x and the r-squared value is 0.924. a. One state had an average reading score of 502. Use the regression equation to predict the average math...
A company has found that its rate of expenditure (in hundreds of dollars) on a certain...
A company has found that its rate of expenditure (in hundreds of dollars) on a certain type of job is given by E'(x) = 2x+4, where x is the number of days since the start of the job. Find the total expenditure if the job takes 5 days. O A. $45 OB. $4,500 O c. $14 OD. $1,400 4 2 where t is measured in hours after the drug is administered. Find the total reaction For a certain drug, the...
2. Suppose a fire insurance company wants to relate the amount of fire damage in major...
2. Suppose a fire insurance company wants to relate the amount of fire damage in major residential fires to the distance between the burning house and the nearest fire station. A random sample of 15 fires in a large suburb is selected. The amount of damage (thousands of dollars) and the distance (miles) between the fire and the nearest fire station are recorded for each fire. The following simple linear regression model was used: Fire Damagei=B0+B1(Distance from Fire Station)i+Ei Coefficients...
A pediatrician wants to determine the relation that exists between a child's height, x, and head...
A pediatrician wants to determine the relation that exists between a child's height, x, and head circumference, y She randomly selects 11 children from her practice, measures their heights and head circumferences and obtains the accompanying data. Complete parts (a) through (g). EEE Click the icon to view the data table. (a) Find the least-squares regression line treating height as the explanatory variable and head circumference as the response variable. Data Table The least-squares regression line is y x (Round...
5. A controller in a company wants to estimate the cost behaviour of customer service costs....
5. A controller in a company wants to estimate the cost behaviour of customer service costs. Which of the following is an application of managerial judgement in determining cost behaviour? A. The accountant performs a scattergraph analysis and deletes several data points determined to be outliers. B. The accountant decides to use the last three years' data, but excluding the period when there, was a workers' labour strike which resulted in reduced productivity C. The accountant runs a regression using...
A large
corporation is interested in whether advertising on TV has had an
effect on sales of their products. Data have been collected in
?=20n=20
different markets on the spend on TV advertising (?x,
measured in thousands of dollars) and product sales (?y,
measured in thousands of units).
The following
are useful summaries of the data:
A large corporation is interested in whether advertising on TV has had an effect on sales of their product: Data have been collected in...
6).
a.b.b.
The data in the table to the right are based on the results of a survey comparing the commute time of adults to their score on a well-being test. Complete parts (a) through (d) below. Click the icon to view the critical values for the correlation coefficient. Commute Time (in minutes) Well-Being Score 5 69.5 16 68.9 27 67.5 34 67.4 47 66.9 68 65.9 97 63.9 (a) Which variable is likely the explanatory variable and which is...
Researchers used data on the average reading and math scores on a national test for each state in a nation to develop a regression equation. The rearchers let the explanatory variable x be the average reading score and the response variable y be the average math score. The regression equation is y = 18.7 +0.953x and the r-squared value is 0.924. a. One state had an average reading score of 502. Use the regression equation to predict the average math...
A company has found that its rate of expenditure (in hundreds of dollars) on a certain type of job is given by E'(x) = 2x+4, where x is the number of days since the start of the job. Find the total expenditure if the job takes 5 days. O A. $45 OB. $4,500 O c. $14 OD. $1,400 4 2 where t is measured in hours after the drug is administered. Find the total reaction For a certain drug, the...
A pediatrician wants to determine the relation that exists between a child's height, x, and head circumference, y She randomly selects 11 children from her practice, measures their heights and head circumferences and obtains the accompanying data. Complete parts (a) through (g). EEE Click the icon to view the data table. (a) Find the least-squares regression line treating height as the explanatory variable and head circumference as the response variable. Data Table The least-squares regression line is y x (Round...
5. A controller in a company wants to estimate the cost behaviour of customer service costs. Which of the following is an application of managerial judgement in determining cost behaviour? A. The accountant performs a scattergraph analysis and deletes several data points determined to be outliers. B. The accountant decides to use the last three years' data, but excluding the period when there, was a workers' labour strike which resulted in reduced productivity C. The accountant runs a regression using...
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