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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
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Average Temperature and Precipitation
The average normal daily temperature (in degrees Fahrenheit) and the
corresponding average monthly precipitation (in inches) for the month of June
are shown here for seven randomly selected cities. Determine if there is a
relationship between the two variables.
Avg. daily temp. x
Avg. mo. precip. y
86
81
83
89
80
74
64
3.4
1.8
3.5
3.6
3.7
1.5
0.2
a.
Construct a scatter plot for the data obtained.
b. Compute the value of the correlation coefficient.
Test the significance of the correlation coefficient using t-test. Use a = 0.05. If
significant, answer d and e.
d. Find the equation of the regression line for the data and graph the line on the scatter
plot.
Make a prediction of the average monthly precipitation if the average daily temperature
is 70°F.
C.
e.
Transcribed Image Text:Average Temperature and Precipitation The average normal daily temperature (in degrees Fahrenheit) and the corresponding average monthly precipitation (in inches) for the month of June are shown here for seven randomly selected cities. Determine if there is a relationship between the two variables. Avg. daily temp. x Avg. mo. precip. y 86 81 83 89 80 74 64 3.4 1.8 3.5 3.6 3.7 1.5 0.2 a. Construct a scatter plot for the data obtained. b. Compute the value of the correlation coefficient. Test the significance of the correlation coefficient using t-test. Use a = 0.05. If significant, answer d and e. d. Find the equation of the regression line for the data and graph the line on the scatter plot. Make a prediction of the average monthly precipitation if the average daily temperature is 70°F. C. e.
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