Jason believes that the sales of coffee at his coffee shop depend upon the weather. He has taken a sample of 6 days. Below you are given the results of the sample.
$\begin{array}{cc}\text { Cups of Coffee Sold }&\text { Temperature }\
350 & 50 \
200 & 60 \
210 & 70 \
100 & 80 \
60 & 90 \
40 & 100
\end{array}$
a. Which variable is the dependent variable?
b. Compute the least squares estimated line.
c. Compute the correlation coefficient between temperature and the sales of coffee.
d. Is there a significant relationship between the sales of coffee and temperature? Use a .05 level of significance. Be sure to state the null and alternative hypotheses.
e. Predict sales of a 90 degree day.

Question

Jason believes that the sales of coffee at his coffee shop depend upon the weather. He has taken a sample of 6 days. Below you are given the results of the sample.
 $\begin{array}{cc}\text { Cups of Coffee Sold }&\text { Temperature }\
350 & 50 \
200 & 60 \
210 & 70 \
100 & 80 \
60 & 90 \
40 & 100
\end{array}$ 
a. Which variable is the dependent variable?
b. Compute the least squares estimated line.
c. Compute the correlation coefficient between temperature and the sales of coffee.
d. Is there a significant relationship between the sales of coffee and temperature? Use a .05 level of significance. Be sure to state the null and alternative hypotheses.
e. Predict sales of a 90 degree day.

Quizplus · Accepted Answer

The Answer of Jason believes that the sales of coffee at his coffee shop depend upon the weather. He has taken a sample of 6 days. Below you are given the results of the sample.
 $\begin{array}{cc}\text { Cups of Coffee Sold }&\text { Temperature }\
350 & 50 \
200 & 60 \
210 & 70 \
100 & 80 \
60 & 90 \
40 & 100
\end{array}$ 
a. Which variable is the dependent variable?
b. Compute the least squares estimated line.
c. Compute the correlation coefficient between temperature and the sales of coffee.
d. Is there a significant relationship between the sales of coffee and temperature? Use a .05 level of significance. Be sure to state the null and alternative hypotheses.
e. Predict sales of a 90 degree day.

Jason Believes That the Sales of Coffee at His Coffee