A set of n = 8 ordered pairs has the following sums. x = 111 x2 = 1,869 y = 618 y2 = 49,374 xy = 7,860 (a) Find the line of best fit. (Round your answers to one decimal place.) ŷ = -2.2 x + 107.4 (b) Predict the value of y when x = 5. (Round your answer to one decimal place.) y = 96.4 (c) Predict the value of x when y = 90. (Round your answer to one decimal place.) x = 8 (d) Find the coefficient of linear correlation. (Round your answer to three decimal places.) (e) Are the predictions in parts (b) and (c) reliable? Why or why not? Yes, they are reliable since the slope is negative.Yes, they are reliable since the correlation coefficient is close to −1. No, they are not reliable since the correlation coefficient is close to −1.Yes, they are reliable since the correlation coefficient is close to 1.No, they are not reliable since the slope is negative.
A set of n = 8 ordered pairs has the following sums. x = 111 x2 = 1,869 y = 618 y2 = 49,374 xy = 7,860 (a) Find the line of best fit. (Round your answers to one decimal place.) ŷ = -2.2 x + 107.4 (b) Predict the value of y when x = 5. (Round your answer to one decimal place.) y = 96.4 (c) Predict the value of x when y = 90. (Round your answer to one decimal place.) x = 8 (d) Find the coefficient of linear correlation. (Round your answer to three decimal places.) (e) Are the predictions in parts (b) and (c) reliable? Why or why not? Yes, they are reliable since the slope is negative.Yes, they are reliable since the correlation coefficient is close to −1. No, they are not reliable since the correlation coefficient is close to −1.Yes, they are reliable since the correlation coefficient is close to 1.No, they are not reliable since the slope is negative.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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PLEASE ANSWER D & E
A set of n = 8 ordered pairs has the following sums.
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(a) Find the line of best fit. (Round your answers to one decimal place.)
ŷ = -2.2 x + 107.4
(b) Predict the value of y when x = 5. (Round your answer to one decimal place.)
y = 96.4
(c) Predict the value of x when y = 90. (Round your answer to one decimal place.)
x = 8
(d) Find the coefficient oflinear correlation . (Round your answer to three decimal places.)
(e) Are the predictions in parts (b) and (c) reliable? Why or why not?
ŷ = -2.2 x + 107.4
(b) Predict the value of y when x = 5. (Round your answer to one decimal place.)
y = 96.4
(c) Predict the value of x when y = 90. (Round your answer to one decimal place.)
x = 8
(d) Find the coefficient of
(e) Are the predictions in parts (b) and (c) reliable? Why or why not?
Yes, they are reliable since the slope is negative.Yes, they are reliable since the correlation coefficient is close to −1. No, they are not reliable since the correlation coefficient is close to −1.Yes, they are reliable since the correlation coefficient is close to 1.No, they are not reliable since the slope is negative.
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