A regression model relating x, number of salespersons at a branch office, to y, annual sales at the office (in thousands of dollars) provided the following computer output from a regression analysis of the data.
Analysis of Variance
SOURCE
DF
Adj SS
Adj MS
Regression
1
6828.6
6828.6
Error
28
2298.8
82.1
Total
29
9127.4
Predictor
Coef
SE Coef
T
Constant
80.0
11.333
7.06
X
50.0
5.482
9.12
Regression Equation
Y = 80.0 + 50.00 X
(a)
Write the estimated regression equation.
ŷ =
(b)
How many branch offices were involved in the study?
Find the value of the test statistic. (Round your answer to two decimal places.)
Find the p-value. (Round your answer to three decimal places.)
p-value =
Predict the annual sales (in thousands of dollars) at the Memphis branch office. This branch employs 14 salespersons.
$ thousand