AP Stat

Quiz
•
Mathematics
•
12th Grade
•
Hard
Barbara White
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
2000 children were surveyed and the report that followed said, "With 98% confidence, between 20% and 50% of all parents make their children eat breakfast." What does 98% confidence mean in this situation?
We can be 98% confident that the method used to get the intervals always gives the correct answer
98% of all parents will make their kids eat breakfast
When used repeatedly, the method used to find the interval produces intervals which include the true proportion about 98% of the time
The kids were 98% confident that they ate breakfast that day.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Mr. Reinecke wants to estimate the proportion of seniors who will go to college next year with 96% confidence and a margin of error of no more than 5%. What size sample does he need to take?
422
419
410
400
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Mrs. Soto polled 1000 adults and estimated with 90% confidence that the proportion of adults who have dessert after dinner is .75. Ms. Libner thinks that 90% confidence isn't enough and wants to do a 95% confidence. How would a margin of error for 95% compare with a ME for 90% if the same sample size was used?
It would be smaller because a higher confidence means a smaller MOE
It would be larger because a higher confidence means a larger MOE
It would be the same because the sample size is the same
Won't be able to tell without knowing the true parameter
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
You want to calculate a 98% confidence interval for a population proportion with a sample of n = 20. What is the appropriate z*?
2.326
1.960
2.054
2.518
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A survey of a random sample of 2500 adults who have a credit card found that 570 had a balance of $1000 or more on their credit card.
What would be the name of the confidence interval if constructed in this situation?
1 sample p interval for z
1 sample z interval for p
1 sample t interval for p
1 sample p interval for t
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A survey of a random sample of 2500 adults who have a credit card found that 570 had a balance of $1000 or more on their credit card.
What would NOT be an condition we need to verify before constructing the interval?
np̂ ≥ 10 and n(1-p̂) ≥ 10
n ≥ 30
10% condition
random sample
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A survey of a random sample of 2500 adults who have a credit card found that 570 had a balance of $1000 or more on their credit card.
What would be the margin of error if you had a 99% confidence?
0.022
0.0046
0.008
0.016
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