Two simple questions on coefficient

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lOOK AT THE FOLLOWING 2 SIMPLE QUESTIONS NO PLAGIARISM , CARRY THEM OUT EFFECTIVELY. EACH SHOULD BE IN A SEPARATE DOCUMENT. FOLLOW ALL THE INSTRUCTIONS

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l Verizon LTE * 33% 7:10 AM Ims.grantham.edu 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. < ܗ ܗ ܗ ܗ ܗ ܘ Book Pages (1) Price (y) A 500 $7.00 B 700 7.50 с 750 9.00 D 590 6.50 E 540 7.50 F 650 7.00 G 480 4.50 1. Compute the coefficient of determination and explain its meaning. 2. Compute the correlation coefficient between the price and the number of pages. Test to see if x and y are related. Use a = 0.10. Question 2 The following data represent a company's yearly sales volume and its advertising expenditure over a period of 8 years. (1) Sales in (x) Advertising in (510,000) Millions of Dollars 15 16 18 17 16 19 19 24 33 35 34 36 37 29 1. Develop a scatter diagram of sales versus advertising and explain what it shows regarding the relationship between sales and advertising 2. Use the method of least squares to compute an estimated regression line between sales and advertising. 3. If the company's advertising expenditure is $400,000, what are the predicted sales? Give the answer in dollars. 4. What does the slope of the estimated regression line indicate? Grading Criteria Assignments Maximum Points 40 Meets or exceeds established assignment criteria Demonstrates an understanding of lesson concepts Clearly presents well-reasoned ideas and concepts 20 30 ©* 36% . Verizon LTE 7:02 AM Ims.grantham.edu Week 2 Assignment Question 1 1. Compute the weighted mean for the following data. Xi Weight (w;) 19 12 17 30 14 28 13 10 18 10 Question 2 1. If P(A) = 0.50, P(B) = 0.40, and P(AUB) = 0.88, then P( BA) = Question 3 Six vitamin and three sugar tablets identical in appearance are in a box. One tablet is taken at random and given to Person A. A tablet is then selected and given to Person B. What is the probability that 1. Person A was given a vitamin tablet? 2. Person B was given a sugar tablet given that Person A was given a vitamin tablet? 3. neither was given vitamin tablets? 4. both were given vitamin tablets? 5. exactly one person was given a vitamin tablet? 6. Person A was given a sugar tablet and Person B was given a vitamin tablet? 7. Person A was given a vitamin tablet and Person B was given a sugar tablet? Grading Criteria Assignments Maximum Points 40 20 Meets or exceeds established assignment criteria Demonstrates an understanding of lesson concepts Clearly presents well-reasoned ideas and concepts Uses proper mechanics, punctuation, sentence structure, and spelling 30 10
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