STATISTICS HOMEWORK
doloresm2007
stat200_q6.docTwo Questions
1. The following table shows the # of ice cream bars sold by
a vendor as explained by the outside high temperature
|
High Temperature for the day in degress F |
59 |
68 |
79 |
86 |
97 |
|
# of bars of ice cream sold |
11 |
32 |
73 |
76 |
151 |
|
|
|
|
|
|
|
a) Find
xx
SS
xy
SS
yy
SS
b) Write the equation of the line of best fit (the least square regression line)
c) Use the line of best fit to predict the # of cups sold
on a day with a high temperature of 70 degrees F.
d) What is the value of the correlation coefficient between the two variables.
e) What percentage of variation in the # of cups sold is explained by the line of best fit?
f) Is the correlation significant at 5% level of significance?
2. Submit the answer of the question #10 on the page 595 of the text book.
