AP Statistics Inference Tests and Intervals

Quiz
•
Mathematics
•
12th Grade
•
Hard
Anthony Clark
FREE Resource
14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the margin of error of this sample?
0.28
0.14
0.342
0.684
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 100 WHS students found that 53 of them were in possession of a pencil. What is the p-hat for this sample?
0.53
0.5
0.47
1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The symbol for the sample proportion is __________.
Zc
p̂
E
q
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
To test a claim about a mean, when the population standard deviation is unknown we use:
z procedures
Pythagorean Theorem
t procedures
np > 10 and n(1-p) > 10
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A quality control inspector will measure the salt content (in milligrams) in a random sample of bags of potato chips from an hour of production. Which of the following would result in the smallest margin of error in estimating the mean salt content σ ?
90% confidence; n = 25
90% confidence; n = 50
95% confidence; n =25
95% confidence; n =50
n=100 at any confidence level
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 25 laboratory rats. A 95% confidence interval for the mean blood cholesterol level μ is 80.2 to 89.8. Which of the following would cause the most worry about the validity of this interval?
There is a clear outlier in the data
A stemplot of the data shows a mild right skew
You do not know the population standard deviation σ
The population distribution is not exactly Normal.
None of these are a problem when using t-interval
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A random sample of 25 Ohio students had a mean ACT score of 21 with a standard deviation of 1.2. Which of the following is the 95% confidence interval for the true average ACT score for Ohio students?
(20.53, 21.47)
(18.648, 23.352)
(20.505, 21.495)
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