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MA215 Business Statist… Week 7 “Linea…

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Upload Assignment: W7 WrittenUpload Assignment: W7 Written Assignment “Week 7 Assignment”Assignment “Week 7 Assignment”

Due Date

Tuesday, April 30, 2019

11:59 PM

Points Possible

100

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A S S I G N M E N T I N F O R M A T I O N

Business Statistics

Week 7 Assignment

1. Create a scatter diagram which shows the trendline and provides the coefficient of determination.

2. Define coefficient of determination. Define Pearson’s Product Moment Correlation Coefficient. What are these values in this example, and what does each one tell you? Interpret both.

3. Conduct a full hypothesis test to determine if x and y are related. Use α = 0.05.

1. Develop a scatter diagram of sales versus advertising. Include the trendline equation and the coefficient of determination.

2. If the company's advertising expenditure is $315,000, what are the predicted sales?

3. If the company wanted $9,500,000 in sales, what should the advertising budget be?

Grading Criteria Assignments Maximum Points

Meets or exceeds established assignment criteria 40

Demonstrates an understanding of lesson concepts 20

Clearly presents well-reasoned ideas and concepts 30

Uses proper mechanics, punctuation, sentence structure, and spelling

10

Total 100

Question 1

Assume you have noted the following prices for paperback books and the number of pages that each book contains. Develop a least-squares estimated regression line. Book Pages (x variable) Price (y variable) A 500 $7.00 B 610 $8.50 C 550 $7.30 D 650 $9.00 E 530 $7.25 F 600 $8.00 G 477 $6.25

Question 2 The following data represent a company's yearly sales volume and its advertising expenditure over a period of 8 years.

Advertising (x) Sales (y)

400,000 6,000,000

500,000 7,200,000

500,000 8,000,000

660,000 7,500,000

790,000 8,900.000

540,000 8,100,000

420,000 5,900.000

380,000 4,000,000

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