Confidence Intervals
Authored by Mackenzie Robinson
Mathematics
9th - 12th Grade
CCSS covered
Used 1+ times
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13 questions
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1.
MATH RESPONSE 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.
Mathematical Equivalence
ON
2.
DROPDOWN QUESTION
5 mins • 1 pt
A large sample has mean of 7.1 and Standard Error of 2.3. (a)
3.
MATH RESPONSE QUESTION
2 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?
Mathematical Equivalence
ON
4.
MATH RESPONSE QUESTION
2 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.
Find the critical value.
Mathematical Equivalence
ON
5.
MULTIPLE CHOICE QUESTION
3 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.
Find the Standard Error.
75
10
105.2
1.155
Tags
CCSS.HSS.IC.B.4
6.
MATH RESPONSE QUESTION
2 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.
Find the Margin of Error to two decimal places.
Mathematical Equivalence
ON
7.
DRAG AND DROP QUESTION
5 mins • 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. It is desired to construct a 99% confidence interval for the mean lifetime of this type of battery. (a)
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