What is the value of the sample correlation coefficient for these data? Round your answer to at least three decimal places.
What is the value of the sample correlation coefficient for these data? Round your answer to at least three decimal places.
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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Transcribed Image Text:An electric utility wishes to examine the relationship between temperature and electricity use in its service region during the summer months. The bivariate data
below give the maximum temperature (denoted by x, in degrees Fahrenheit) and the electricity use (denoted by y, in thousands of kilowatt hours) for a random
sample of fifteen summer days. The data are shown in the Figure 1 scatter plot. Also given are the products of the temperature values and values for electricity
use for each of the fifteen days. (These products, written in the column labelled "xy," may aid in calculations.)
Temperature, x Electricity use, y
(in degrees
Fahrenheit)
(in thousands of
kilowatt hours)
ху
71.4
275.4
19663.56
y
82.9
313.2
25964.28
400 +
97.4
389.6
37947.04
375+
89.6
319.0
28582.4
350 -
93.6
353.1
33050.16
75.7
289.0
21877.3
325
XX
92.9
352.9
32784.41
300-
71.5
234.5
16766.75
2751
81.3
319.6
25983.48
250
69.0
290.8
20065.2
X
95.1
334.3
31791.93
225
83.1
353.6
29384.16
76 86 85 96 9 100
96.4
304.6
29363.44
90.4
319.4
28873.76
Figure 1
83.5
265.0
22127.5
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Answer the following. Carry your intermediate computations to at least four decimal places, and round your answer as specified below. (If necessary, consult a
list of formulas.)
What is the value of the sample correlation coefficient
for these data? Round your answer to at least three
decimal places.
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