Stats Flashcards
P-value 0.4 - If the null hypothesis were true, we would…
almost never observe a sample result like ours
If the differences between the “Average” values in the SUMMARY-table had been larger, then the valueof “F” would have been…
larger
If the “Variance” values in the SUMMARY-table had been larger, then the value of “F” would have been
smaller
T-Statistic: 5.17
10% Table value: 4.605
Can you reject the null or not?
You can reject the null at 10% significance
According to Bud’s population model, what is the average Income of students with an Age of 20 years?
a) 955.415
b) b0 + 20b1 +e
c) β0 + 20β1 +ε
d) β0 + 20β1
d)β0 + 20β1
EXCEL chooses the coefficients b0=210.715 and b1=37.235 in such a way, that the regression line matches Bud’s data as well as possible. Which of the claims at a), b) and c) below is incorrect?
a) Total SS” would have been larger.
b) the “R Square” would have been smaller.
c) the “Residual SS” would have been larger.
d) None of the claims at a), b) or c) is incorrect
A)
In terms of simple regression, the VIF always equals…
1
When your remove a predictor variable, R2 always goes…
down
When you remove a relevant predictor variable (as is the case here, with p =0.040), the adjusted R2 goes
down
Which of the following statements is not true?
a) The matrix has an inverse.
b) The system of linear equations Cxb⋅= always has a unique solution.
c) The matrixC2 has an inverse.
d) The determinant of the matrix 2C is equal to 6
D) By the theory, we know that 2power4 is not equal to 6.
Which of the following prediction intervals is theshortest?
a) A 90% prediction interval for the weight of a person with a height of 1.90 meters.
b) A 99% prediction interval for the weight of a person with a height of 1.90 meters.
c) A 90% prediction interval for the weight of a person with a height of 1.70 meters.
d) A 99% prediction interval for the weight of a person with a height of 1.70 meter
C
Larger Sample Size
_____ T-value
Larger
Larger Variance
______ T-Value
Smaller T-Value
Larger Sample Size
_____ P- Value
Smaller
Larger Variance
_____ P-Value
Larger
