Statistics Review 2 (Topics 5 - 7)
Authored by Jennifer Droemer
Mathematics
University
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50 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred. They were then sorted by age.
What is the probability that a person, selected at random, is in the 18-34 age group? Write your answer as a decimal rounded to four places.
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred. They were then sorted by age.
What is the probability that a person, selected at random, prefers Toyota? Write your answer as a decimal rounded to four places.
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred. They were then sorted by age.
What is the probability that a person, selected at random, is in the 35 - 49 age group and prefers Nissan? Write your answer as a decimal rounded to four places.
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred. They were then sorted by age.
What is the probability that a randomly selected person prefers Honda, given that they are in the 18 - 34 age group? Write your answer as a decimal rounded to four places.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred. They were then sorted by age.
What is the probability that a person, selected at random, is in the 50 - 65 age group or prefers Toyota? Write your answer as a decimal rounded to four places.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
One hundred and thirty-two individuals were selected at random and asked which brand of car they preferred. They were then sorted by age.
Does there appear to be an association between a person's age and what brand of car they prefer?
Yes; A person's age and car brand preference seem to be associated because there is variation in the data.
No; A person's age and car brand preference are independent.
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
N(0, 1)
Which of the following are properties of a Normal Distribution? Choose all that apply.
symmetric
bell-shaped
positively skewed
negatively skewed
unimodal
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