Confidence Intervals
12th Grade
•17 Qs
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Confidence Intervals
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Medium
+2
Standards-aligned
Lori Harder
Used 47+ times
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17 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the definition of a "point estimate?"
The midpoint of the confidence interval
The sample size
The population
The standard deviation
Tags
CCSS.HSS.IC.B.4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The amount added and subtracted to the statistic.
Margin of error
Statistic
Population
Point estimator
Tags
CCSS.HSS.IC.B.4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the point estimator for the interval (5 , 13)?
9
10
11
8
Tags
CCSS.HSS.MD.A.2
CCSS.HSS.MD.A.3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the margin of error for the interval (6.8, 12.9)?
3.05
9.85
5.83
8.41
Tags
CCSS.HSS.IC.B.4
5.
MULTIPLE CHOICE QUESTION
30 sec • 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.
Find the point estimate.
10
105.2
.90
75
Tags
CCSS.HSS.IC.B.4
6.
MULTIPLE CHOICE QUESTION
30 sec • 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.
Find the Critical Value for the mean.
1.67
1.28
-1.67
-1.28
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.ID.A.4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The lifetime of a certain type of batter is known to be normally distributed with a standard deviation of 20 hours. A sample of 50 batteries had a mean lifetime of 120.1 hours. Construct a 99% confidence interval for the mean lifetime of this type of battery.
(111.2, 128.9)
(114.53, 131.23)
(112.52, 127.68)
(118.43, 122.43)
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.ID.A.4
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