Question 6: In a study of the relation between the price (in thousand pounds) (x) and the number of computers sold (y) monthly, we draw a sample of seven months and obtain the following results Ex; = 63 ΣΥ-210 Eyi = 6820 The standard deviation of the price is 3.9 thousand pounds The determinant coefficient ( R?) = 0.7921 There is an inverse relation between the price and the number of computers sold. Find: a) Find the suitable least squares regression line. b) Give a brief interpretation of the values of the Y-intercept and slope calculated in the previous part. c) Predict the number of computers sold when the price of the computer unit is twenty thousand pounds.

Question 6: In a study of the relation between the price (in thousand pounds) (x) and the number of computers sold (y) monthly, we draw a sample of seven months and obtain the following results Ex; = 63 ΣΥ-210 Eyi = 6820 The standard deviation of the price is 3.9 thousand pounds The determinant coefficient ( R?) = 0.7921 There is an inverse relation between the price and the number of computers sold. Find: a) Find the suitable least squares regression line. b) Give a brief interpretation of the values of the Y-intercept and slope calculated in the previous part. c) Predict the number of computers sold when the price of the computer unit is twenty thousand pounds.

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter11: Topics From Analytic Geometry

Section: Chapter Questions

Problem 47RE

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