f) Calculate and interpret the r value in the context of this scenario.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
please send solution for part f only handwritten solution accepted
![6. The price of a branded dishwasher tablets varies through the year depending on
promotions etc. A supermarket is interested in the effect of the price change on the
number of sales. They collated a small sample of daily sales data from the last 12
months and the results are displayed in the graph below.
Daily Sales Dishwasher Tablets vs Price
y = -8.46x + 108
R2 = 0.69
80
70
60
50
40
30
20
10
£0.00
£2.00
£4.00
£6.00
£8.00
£10.00
£12.00
Price
a) Perform a visual assessment of the scatterplot and describe the data points
and data pattern.
b) Use the regression equation given above at the right corner of the graph and
state the value for intercept (the constant).
c) Use the regression equation given above at the right corner of the graph and
state the value for slope (the gradient).
d) Use the regression equation and calculate the predicted number of sales
when a dishwasher tablets cost £6.00.
e) State and interpret the r2 value in the context of this scenario.
f) Calculate and interpret the r value in the context of this scenario.
Sales](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F416b0759-b8a5-4149-833b-484b09c8e3dd%2F755ab8d9-2211-466c-86dd-17cfd3d053a4%2Fiucxjwr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:6. The price of a branded dishwasher tablets varies through the year depending on
promotions etc. A supermarket is interested in the effect of the price change on the
number of sales. They collated a small sample of daily sales data from the last 12
months and the results are displayed in the graph below.
Daily Sales Dishwasher Tablets vs Price
y = -8.46x + 108
R2 = 0.69
80
70
60
50
40
30
20
10
£0.00
£2.00
£4.00
£6.00
£8.00
£10.00
£12.00
Price
a) Perform a visual assessment of the scatterplot and describe the data points
and data pattern.
b) Use the regression equation given above at the right corner of the graph and
state the value for intercept (the constant).
c) Use the regression equation given above at the right corner of the graph and
state the value for slope (the gradient).
d) Use the regression equation and calculate the predicted number of sales
when a dishwasher tablets cost £6.00.
e) State and interpret the r2 value in the context of this scenario.
f) Calculate and interpret the r value in the context of this scenario.
Sales
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