Question 1

Microwave Sales Narrative
A microwave oven manufacturer has collected the data shown below on number of units sold (y) in the thousands of dollars and the number of ads (x) placed during the month.  
-Refer to Microwave Sales Narrative. Compute the standard error of the point estimate of number of units sold if there are 140 ads.

Accepted Answer

The answer of Microwave Sales Narrative
A microwave oven manufacturer has...

Question 2

TV Game Show Revenues Narrative
An ardent fan of television game shows has observed that, in general, the more educated the contestant, the less money he or she wins. To test her belief, she gathers data about the last eight winners of her favourite game show. She records their winnings in dollars and the number of years of education. The results are as follows. 
-Refer to TV Game Show Revenues Narrative. Estimate with 95% confidence the average winnings of all contestants who have 15 years of education.

Accepted Answer

The answer of TV Game Show Revenues Narrative
An ardent fan...

Question 3

Special Programs Narrative
A social skills training program was implemented with seven students with disabilities in a study to determine whether the program caused improvement in pre/post measures and behaviour ratings. For one such test, the pre- and posttest scores for the seven students are given in the table. 
-Refer to Special Programs Narrative. What type of correlation, if any, do you expect to see between the pre- and posttest scores? Plot the data. Does the correlation appear to be positive or negative?

Accepted Answer

The answer of Special Programs Narrative
A social skills training program...

Question 4

TV Game Show Revenues Narrative
An ardent fan of television game shows has observed that, in general, the more educated the contestant, the less money he or she wins. To test her belief, she gathers data about the last eight winners of her favourite game show. She records their winnings in dollars and the number of years of education. The results are as follows. 
-Refer to TV Game Show Revenues Narrative. Predict with 95% confidence the winnings of a contestant who has ten years of education.

Accepted Answer

The answer of TV Game Show Revenues Narrative
An ardent fan...

Question 5

Microwave Sales Narrative
A microwave oven manufacturer has collected the data shown below on number of units sold (y) in the thousands of dollars and the number of ads (x) placed during the month.  
-Refer to Microwave Sales Narrative. Compute a point estimate of number of units sold if there are 140 ads.

Accepted Answer

The answer of Microwave Sales Narrative
A microwave oven manufacturer has...

Question 6

TV Game Show Revenues Narrative
An ardent fan of television game shows has observed that, in general, the more educated the contestant, the less money he or she wins. To test her belief, she gathers data about the last eight winners of her favourite game show. She records their winnings in dollars and the number of years of education. The results are as follows. 
-Refer to TV Game Show Revenues Narrative. Predict with 95% confidence the winnings of a contestant who has 15 years of education.

Accepted Answer

The answer of TV Game Show Revenues Narrative
An ardent fan...

Question 7

Microwave Sales Narrative
A microwave oven manufacturer has collected the data shown below on number of units sold (y) in the thousands of dollars and the number of ads (x) placed during the month.  
-Refer to Microwave Sales Narrative. Compute a 95% prediction interval for sales during the next month that happens to be associated with 140 ads.

Accepted Answer

The answer of Microwave Sales Narrative
A microwave oven manufacturer has...

Question 8

Microwave Sales Narrative
A microwave oven manufacturer has collected the data shown below on number of units sold (y) in the thousands of dollars and the number of ads (x) placed during the month.  
-Refer to Microwave Sales Narrative. Compute a 95% confidence interval for the average number of units sold in all months with 140 ads.

Accepted Answer

The answer of Microwave Sales Narrative
A microwave oven manufacturer has...

Question 9

Microwave Sales Narrative
A microwave oven manufacturer has collected the data shown below on number of units sold (y) in the thousands of dollars and the number of ads (x) placed during the month.  
-Refer to Microwave Sales Narrative. Determine the least-squares estimates of the regression parameters, and the least-squares regression line.

Accepted Answer

The answer of Microwave Sales Narrative
A microwave oven manufacturer has...

Question 10

TV Game Show Revenues Narrative
An ardent fan of television game shows has observed that, in general, the more educated the contestant, the less money he or she wins. To test her belief, she gathers data about the last eight winners of her favourite game show. She records their winnings in dollars and the number of years of education. The results are as follows. 
-Refer to TV Game Show Revenues Narrative. Estimate with 95% confidence the average winnings of all contestants who have ten years of education.

Accepted Answer

The answer of TV Game Show Revenues Narrative
An ardent fan...

Question 11

Special Programs Narrative
A social skills training program was implemented with seven students with disabilities in a study to determine whether the program caused improvement in pre/post measures and behaviour ratings. For one such test, the pre- and posttest scores for the seven students are given in the table. 
-Refer to Special Programs Narrative. Calculate the correlation coefficient r. Is there a significant positive correlation between x and y? Explain.

Accepted Answer

The answer of Special Programs Narrative
A social skills training program...

Quiz 12: B: linear Regression and Correlation