MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question

Please answer d

Disk drives 2016 again Recall the data on disk drives we saw in Chapter 6, Exercise 4. Suppose we want to predict Price from Capacity. Capacity (in TB) Price (in $) 0.50 1.0 59.99 79.99 2.0 111.97 3.0 109.99 4.0 149.99 T 6.0 423.34 596.11 8.0 12.0 1079.99 4461.00 32.0 X = 7.6111 )= 785.819 %3D SD( x) = = 9.855 SD(y) =1418.67 r= 0.9876 a) Find the slope estimate, b.. b) What does it mean, in this context? c) Find the intercept, bo- d) What does it mean, in this context? Is it meaningful? e) Write down the equation that predicts Price from Capacity. f) What would you predict for the price of a 20 TB drive? g) A 20 TB drive on Amazon.com was listed at $2017.86. Ac- cording to the model, does this seem like a good buy? How much would you save compared to what you expected to pay?
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Transcribed Image Text:Disk drives 2016 again Recall the data on disk drives we saw in Chapter 6, Exercise 4. Suppose we want to predict Price from Capacity. Capacity (in TB) Price (in $) 0.50 1.0 59.99 79.99 2.0 111.97 3.0 109.99 4.0 149.99 T 6.0 423.34 596.11 8.0 12.0 1079.99 4461.00 32.0 X = 7.6111 )= 785.819 %3D SD( x) = = 9.855 SD(y) =1418.67 r= 0.9876 a) Find the slope estimate, b.. b) What does it mean, in this context? c) Find the intercept, bo- d) What does it mean, in this context? Is it meaningful? e) Write down the equation that predicts Price from Capacity. f) What would you predict for the price of a 20 TB drive? g) A 20 TB drive on Amazon.com was listed at $2017.86. Ac- cording to the model, does this seem like a good buy? How much would you save compared to what you expected to pay?
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