Multiple choices 41/50
Answer (Choose 1 answer)
(See picture)
A. 0.9795
B. 335.0473
C. 0.7845
D. -1.8940
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
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Multiple R
0.8857
R Square
0.7845
Adjusted R Square
0.7801
Standard Error
1.3704
Observations
51
ANOVA
df
Regression
Residual
1
SS
335.0472
MS
335.0473
1.8782
F
178.3859
Significance F
Total
50 427.0798
Coefficients
Standard
Error
Intercept
Hours
-1.8940
0.9795
t Stat
0.4018
-4.7134
0.0733
13.3561
P-value
0.0000
0.0000
Lower 95%
Upper 95%
-2.7015
0.8321
-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
