AP Stats Chapter 3

Quiz
•
Mathematics
•
12th Grade
•
Hard
Anthony Clark
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which statements below about least-squares regression are correct?
Only I is correct.
Only II is correct.
Only III is correct.
Both II and III are correct.
All three statements—I, II, and III—are correct.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a statistics course, a linear regression equation was computed to predict the final exam score from the score on the first test. The equation was yˆ =10+0.9x where y is the final-exam score and x is the score on the first test. Carla scored 95 on the first test. What is the predicted value of her score on the final exam?
85.5
90
9
95.5
none of these
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a statistics course, a linear regression equation was computed to predict the final exam score from the score on the first test. The equation was yˆ =10+0.9x where y is the final-exam score and x is the score on the first test. Bill scored a 90 on the first test and a 93 on the final exam. What is the value of his residual?
–2.0
2.0
3.0
93
none of these
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A set of data describes the relationship between the size of annual salary raises and the performance ratings for employees of a certain company. The least squares regression equation is y-hat= 1400 + 2000x where y is the raise amount (in dollars) and x is the performance rating. Which of the following statements must be true?
For each one-point increase in performance rating, the raise will increase on average by $1400.
The actual relationship between salary raises and performance rating is linear.
The residuals for half the observations in the dataset will be positive.
The correlation between salary raise and performance rating is negative.
If the mean performance rating is 1.2, then the mean raise is $3800.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is this a probability distribution?
No, the sum of p(x) does not equal 1.
Yes, all p(x) are between 0 and 1.
No, all p(x) are not between 0 and 1.
Yes, the sum p(x) is 1.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is this a probability distribution?
No
Yes
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A
B
C
D
E
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