Kizspy | Question: 40
(Choose 1 answer)
(See picture)
A. -1.8940
B. 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
Regression
Residual
Total
1
SS
335.0472
MS
335.0473
1.8782
F
178.3859
Significance F
50
427.0798
Intercept
Hours
Coefficients
-1.8940
0.9795
Standard
Error
t Stat
0.4018 -4.7134
0.0733 13.3561
P-value
0.0000
0.0000
Lower 95%
-2.7015
0.8321
Upper 95%
-1.0865
1.1269
The estimated change in mean salary (in thousands of dollars) as a result of spending
an extra hour per day studying is
