
Interpreting and Constructing Confidence Interval
Authored by Anthony Clark
Mathematics
12th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is an example of an interval estimate?
point estimate
critical value
confidence interval
statistic
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A __________ gives an interval of plausible values for the _____________.
confidence interval, statistic
point estimate, parameter
point estimate, statistic
confidence interval, parameter
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Construct a 90% confidence interval of a random sample size of 19 cows with a mean of 155.526 and a standard deviation of 19.993.
(146.54, 164.52)
(147.57, 163.48)
(147.59, 163.46)
(143.69, 167.36)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When interpreting the confidence interval, make sure that you are describing the
statistic
parameter
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A confidence interval for the mean score of a test is (75, 85). What is the margin of error?
5
10
15
20
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the margin of error in a confidence interval is 4, what is the range of the confidence interval around a sample mean of 50?
46 to 54
48 to 52
45 to 55
49 to 51
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Identify the confidence interval used in the figure below if each shaded area is equal to 0.05.
90%
95%
98%
99%
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