AP Statistics
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
Anthony Clark
FREE Resource
Enhance your content in a minute
14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements about residuals are true?
I and II
I and III
II and III
I, II, and III
None are true.
Answer explanation
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
-0.64
-0.80
0.64
0.80
There is insufficient information to answer this question.
Answer explanation
We are given r-squared = 0.64.
To find r, we square root 0.64 AND give it the same sign as the slope. So, r = -0.80
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A simple random sample of 25 world-ranked tennis players provides the following statistics: Number of hours practiced per day: mean = 7.3, standard deviation = 1.2 Yearly winnings: mean = $1,820,000, standard deviation = $310,000 Correlation = 0.23 Based on this data, what is the LSRL that predicts winnings from number of hours practiced?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
0.28
0.45
0.56
0.90
-0.28
Answer explanation
Correlation is unitless, so changing the values by shifting or rescaling or even switching x and y will not change the value of the correlation.
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