5. The table below shows actual temperatures and predicted temperatures for San Antonio from August 01...

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5. The table below shows actual temperatures andpredicted temperatures for San Antonio from August 01 through15th.
https://www.accuweather.com/en/us/san-antonio-tx/78205/august-weather/351198
Day Temperature
1 100
2 100
3 99
4 98
5 101
6 100
7 101
8 102
9 103
10 103
11 104
12 104
13 104
14 103
15 100
a. Decide which variable should be the independentvariable and which should be the dependent variable.
b. Draw a chart for the data. Make sure to show theequation and the r-squared on the chart.
c. Does it appear from inspection thatthere is a relationship between the variables? Why or why not?
d. Calculate the least-squares line. Put theequation in the form of: ? = a + bx
e. Find the correlation coefficient. Is itsignificant?
f. Does it appear that a line is the best way tofit the data? Why or why not?
g. Are there any outliers in the data? Whichones?
h. Use the least squares line to estimate what willbe be the temperature for August 16, 17 and 18.
16-Aug 17-Aug 18-Aug
i. Do you believe the answers above are reasonable?Why or why not?
j. What is the slope of the least-squares(best-fit) line? Interpret the slope.

Answer & Explanation Solved by verified expert

4.1 Ratings (690 Votes)

aIndependent variable DayDependent variable TemperaturebThis part is solved in excel by following these stepsStep 1 Write the data values in excel The screenshot is shownbelowStep 2 Select the data values then INSERTRecommended Charts X YScatter OKThe chart is obtained The screenshot is shown belowStep 3 To add Trend line linear equation and See Answer

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5. The table below shows actual temperatures andpredicted temperatures for San Antonio from August 01 through15th.
https://www.accuweather.com/en/us/san-antonio-tx/78205/august-weather/351198
Day	Temperature
1	100
2	100
3	99
4	98
5	101
6	100
7	101
8	102
9	103
10	103
11	104
12	104
13	104
14	103
15	100

a. Decide which variable should be the independentvariable and which should be the dependent variable.

b. Draw a chart for the data. Make sure to show theequation and the r-squared on the chart.
c. Does it appear from inspection thatthere is a relationship between the variables? Why or why not?

d. Calculate the least-squares line. Put theequation in the form of: ? = a + bx

e. Find the correlation coefficient. Is itsignificant?

f. Does it appear that a line is the best way tofit the data? Why or why not?

g. Are there any outliers in the data? Whichones?

h. Use the least squares line to estimate what willbe be the temperature for August 16, 17 and 18.
16-Aug		17-Aug	18-Aug
i. Do you believe the answers above are reasonable?Why or why not?

j. What is the slope of the least-squares(best-fit) line? Interpret the slope.