Interpreting and Constructing Confidence Interval
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
Anthony Clark
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suppose that $51,759 was the median income for all households in 2012. Does the interval ($51,484, $52,394) provide convincing evidence that the median household income increased in 2013?
Yes
No
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the format for interpreting a confidence interval?
The interval from ___ to ___ captures the true mean in context.
C% of samples of the same size taken from the same population will capture the parameter in question
There is convincing evidence that C% gives the interval (___, ___) capturing the parameter in question.
We are C% confident that the interval from ___ to ___ captures the [parameter in context].
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What can you do to reduce the margin of error?
increase the confidence level
decrease the confidence level
increase sample size
decrease sample size
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the critical value z* for a 99% confidence interval?
-2.58
1.96
-1.64
2.58
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Given the interval (1.2, 1.8), what is the point estimate and the margin of error?
1.5, 0.6
1.5, 0.3
1.2, 0.3
1.2, 0.6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What critical value t* is used in constructing a 99% confidence interval based on n = 12 randomly selected observations.
3.106
3.055
2.58
1.96
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Increasing the sample size __________ the confidence interval.
increases
decreases
does not affect
there is not enough evidence to determine the answer
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