Multiplechoice 54 true 939590529 multi90528

MultipleChoice 54 True
0 -939590529 MultipleChoice 54
-939590528 MultipleChoice 34 True
0 -939590528 MultipleChoice 34

Question 7. Question : A sales manager for an advertising agency believes that there is a relationship between the
number of contacts that a salesperson makes and the amount of sales dollars earned.
A regression ANOVA shows the following results:
What is the value of the standard error of estimate?
Question 8. Question : In the equation, Ŷ = a + bX , what is Ŷ?
-939590527 MultipleChoice 43 True
0 -939590527 MultipleChoice 43

Question 9. Question : A hypothesis test is conducted at the .05 level of significance to test whether or not the
population correlation is zero. If the sample consists of 25 observations and the correlation
coefficient is 0.60, what is the computed value of the test statistic? Round to two decimal
places.
Student Answer: 1.96
2.07
2.94
3.60
MultipleChoice 15 True
0 -939590524 MultipleChoice 15
Question 10. Question : What is the null hypothesis to test the significance of the slope in a regression equation?
1. Question : An electronics company wants to compare the quality of their cell phones to the cell phones
from three competitors. They sample 10 phones from each company and count the number
of defects for each phone. If ANOVA was used to compare the average number of defects,
then the treatments would be defined as:
-939590525 MultipleChoice 35 True
0 -939590525 MultipleChoice 35
0 -939590523 MultipleChoice 20

Student Answer: The number of cell phones sampled.
The average number of defects.
The total number of phones.
The four companies.
Question 2. Question : Two accounting professors decided to compare the variance of their grading procedures. To
accomplish this, they each graded the same 10 exams, with the following results:
What are the degrees of freedom for the numerator of the F ratio?
Question 3. Question : What distribution does the F distribution approach as the sample size increases?
-937129551 MultipleChoice 11 False
0 -937129551 MultipleChoice 11

Normal
Poisson
Exponential
Question 4. Question : A manufacturer of automobile transmissions uses three different processes. Management
ordered a study of the production costs to see if there is a difference among the three
processes. A summary of the findings is shown next.
In an ANOVA table, what are the total degrees of freedom?
Student Answer: 27
28
29
30
-937129548 MultipleChoice 25 True
0 -937129548 MultipleChoice 25
Question 5. Question : When the null hypothesis for an ANOVA analysis comparing four treatment means is
rejected, _________________
-937129549 MultipleChoice 2 False
0 -937129549 MultipleChoice 2

Question 6. Question :