Confidence Intervals Review
Authored by Jeffery Teems
Mathematics
9th Grade
CCSS covered
Used 4+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A sample size of n = 64 is drawn from a population whose standard deviation is σ = 5.6.
Find the margin of error for a 99% confidence interval for µ.
1.799
1.798
1.803
Tags
CCSS.HSS.IC.B.4
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
An IQ test was given to a simple random sample of 75 students at a certain college. The sample mean score was 105.2. Scores on this test are known to have a standard deviation of 10. It is desired to construct a 90% confidence interval for the mean IQ scores of the students at the college.
What is the point estimate?
75
105.2
10
0.90
Tags
CCSS.HSS.IC.B.4
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the point estimator for the interval (-5 , 13)?
10
9.5
9
-5
Tags
CCSS.HSS.IC.B.4
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In a survey of 104 students, it was found that 79 went to the homecoming game this year.
Calculate a 99% confidence interval for p.
(.59, .79)
(.62, .85)
(.60, .90)
(.65, .87)
Tags
CCSS.HSS.IC.B.4
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
For a sample, the 95% confidence interval is (0.202, 0.482).
What is the margin of error of this sample?
.21
.344
.14
.342
Tags
CCSS.HSS.IC.B.4
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
If using a 95% confidence level, what value of z should you use?
Tags
CCSS.HSS.ID.A.4
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If the mean of a sample is 203 and the margin of error is 4.6, what would be a reasonable mean for the population?
99.2
198.3
207.2
207.7
Tags
CCSS.HSS.IC.B.4
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