Confidence Interval
Authored by Shiuling Huang
Mathematics
11th Grade - University
CCSS covered
Used 78+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identify the confidence interval used in the figure below if each shaded area is equal to 0.05.
Tags
CCSS.HSS.IC.B.4
CCSS.HSS.IC.A.1
CCSS.HSS.ID.A.4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The confidence level of an interval estimate of a parameter is the probability that the interval estimate will contain the parameter.
Tags
CCSS.HSS.IC.B.4
CCSS.HSS.IC.A.1
CCSS.HSS.ID.A.4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Find the value of zc for a 90% confidence interval.
Tags
CCSS.HSS.ID.A.4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A research company wants to estimate the proportion of people who like oatmeal. They want the confidence level to be 95%. The company gets 325 people to sign up for the survey, but on the day that the survey is issued, only 250 people show up and take the survey. What happens to the confidence interval?
Tags
CCSS.HSS.IC.B.4
CCSS.HSS.IC.A.1
5.
MULTIPLE CHOICE QUESTION
3 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
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A large sample has mean of 7.1 and Standard Error of 2.3.
Construct a 90% Confidence Interval for the population mean µ (to two decimal places).
(3.32, 10.88)
(3.8, 7.1)
(3.3, 10.9)
(3.3165, 10.8835)
Tags
CCSS.HSS.IC.B.4
CCSS.HSS.IC.A.1
CCSS.HSS.ID.A.4
7.
MULTIPLE CHOICE QUESTION
1 min • 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
CCSS.HSS.IC.A.1
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