ependent on the number of cups of coffee, x, he ollowing data: People (y) 13 13 11 10 Cups of coffee (x) 1 12 3 nless otherwise stated, you can round values to

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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A particular professor has noticed that the number of people, y, who complain about his attitude is
dependent on the number of cups of coffee, x, he drinks. From eight days of tracking he compiled the
following data:
People (y)
Cups of coffee (x)
T =
13 13
1 1
11
2
Unless otherwise stated, you can round values to two decimal places.
a) Using regression to find a linear equation for ŷ. Round to three decimal places.
strong linear trend
O weak linear trend
no linear trend
10 7 7 7 7
3 4 4 5 5
b) Find the correlation coefficient. Round to three or four decimals.
c) Does the correlation coefficient indicate a strong linear trend, a weak linear trend, or no linear trend?
d) Use your model to predict the number of people that will complain about his attitude if he drinks 9 cups
of coffee.
Transcribed Image Text:A particular professor has noticed that the number of people, y, who complain about his attitude is dependent on the number of cups of coffee, x, he drinks. From eight days of tracking he compiled the following data: People (y) Cups of coffee (x) T = 13 13 1 1 11 2 Unless otherwise stated, you can round values to two decimal places. a) Using regression to find a linear equation for ŷ. Round to three decimal places. strong linear trend O weak linear trend no linear trend 10 7 7 7 7 3 4 4 5 5 b) Find the correlation coefficient. Round to three or four decimals. c) Does the correlation coefficient indicate a strong linear trend, a weak linear trend, or no linear trend? d) Use your model to predict the number of people that will complain about his attitude if he drinks 9 cups of coffee.
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