Confidence Interval-Mean (Minimum Sample Size) 6.1
Quiz
•
Mathematics
•
11th - 12th Grade
•
Practice Problem
•
Medium
Standards-aligned
Ronnie Green
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The standard IQ test has a mean of 97 and a standard deviation of 18. We want to be 95% certain that we are within 5 IQ points of the true mean. Determine the required sample size.
8
50
1
147
Tags
CCSS.HSS.IC.B.4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The standard IQ test has a mean of 95 and a standard deviation of 17. We want to be 95% certain that we are within 2 IQ points of the true mean. Determine the required sample size.
1
373
278
17
Tags
CCSS.HSS.IC.B.4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 3 ounces of the sample mean? The standard deviation of the birth weights is known to be 8 ounces.
47
6
48
7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 3 ounces of the sample mean? The standard deviation of the birth weights is known to be 6 ounces.
5
26
6
27
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 3 ounces of the sample mean? The standard deviation of the birth weights is known to be 9 ounces.
60
8
7
59
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