Kizspy | Question: 30
(Choose 1 answer)
(See picture)
Α. -1.8940
Β. 0.7845
C. 0.9795
D. 335.0473
It is believed that, the average numbers of hours spent studying per day (HOURS)during undergraduate education should have a positive linear relationship with the starting salary (SALARY, measured in thousands of dollars per month) after graduation. Given below is the Excel output for predicting starting salary (Y) using number of hours spent studying per day (X) for a sample of 51 students. NOTE:Only partial output is shown.
Regression Statistics
Multiple R
0.8857
R Square
0.7845
Adjusted R Square
0.7801
Standard Error
1.3704
Observations
51
ANOVA
df
SS
Regression Residual
Total
1
335.0472
MS
335.0473
1.8782
F
178.3859
Significance F
50 427.0798
Standard
Coefficients Error
t Stat
P-value
Lower 95%
Upper 95%
Intercept
Hours
-1.8940
0.4018
-4.7134
0.9795
0.0733
13.3561
0.0000
0.0000
-2.7015
-1.0865
0.8321
1.1269
The estimated change in mean salary (in thousands of dollars) as a result of spending an extra hour per day studying is
