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
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