AP Stats Unit 9
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
Anthony Clark
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Joaquin believes that increasing his walking speed will increase his pulse rate. In an attempt to model this relationship, Joaquin records his pulse rate, in beats per minute (bpm), while walking at each of ten different speeds, in miles per hour (mph). A regression computer output is shown above. Provided that the assumptions for regression inference are satisfied, what can you conclude about the relationship between the walking speed and the pulse rate of Joaquin?
Since the p-value is greater than any reasonable significance level, there is significant evidence of a linear relationship between the Joaquin’s walking speed and his pulse rate.
Since the p-value is less than any reasonable significance level, there is insignificant evidence of a linear relationship between the Joaquin’s walking speed and his pulse rate
Since the p-value is less than any reasonable significance level, there is significant evidence of a linear relationship between the Joaquin’s walking speed and his pulse rate.
Since the p-value is less than any reasonable significance level, no linear relationship exists between the Joaquin’s walking speed and his pulse rate.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Chi-squared tests are invalid if:
The calculated number is really large
One of the expected values is less than 5
One of the observed values is less than 5
The calculated numbers is really small
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the degrees of freedom.
4
5
6
7
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which test would you use to see if age is a factor choosing a person’s favorite fruit? 900 college students were surveyed and their favorite fruit recorded.
Chi-square Goodness of Fit Test
Correlation coefficient
Chi-Square Test for Independence
Chi-square test for correlation
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Involves dividing the population into subgroups, you randomly select entire subgroups. What sampling technique is this?
Simple Random Sample
Snowball Sample
Cluster Random Sample
Stratified Random Sample
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The school district is interested in finding out student and parent opinions about the dress code. They obtain a list of students from each school in the district and put them in alphabetical order. They then send a survey to every 25th student and their parents on the list.
Simple Random Sampling
Stratified Random Sampling
Systematic Sampling
Convenience Sampling
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A
B
C
D
E
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