
1718 Confidence Intervals with Means A
Quiz
•
Mathematics
•
11th - 12th Grade
•
Medium
Standards-aligned
Sarah Lozano
Used 10+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A random sample of 100 visitors to a popular theme park spent an average of $142 on the trip with a standard deviation of $47.5. Which of the following would be the 98% confidence interval for the mean money spent by all visitors to this theme park?
($130.77, $153.23)
($132.77, $151.43)
($132.69, $151.31)
($140.88, $143.12)
Tags
CCSS.HSS.IC.B.4
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A quality control specialist at a glass factory must estimate the mean clarity rating for a new batch of glass using a sample of 18 glass sheets from the batch. Past investigations show that clarity ratings are normally distributed. The specialist decides to use a t-distribution rather than a z-distribution because ...
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A biologist has taken a random sample of a specific type of fish from a large lake. A 95 percent confidence interval was calculated to be 6.8 ± 1.2 pounds. Which of the following is true?
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A researcher wishes to determine the mean energy consumption of a new light bulb. She takes a random sample of 41 bulbs and determines that the mean consumption is 1.3 watts per hour with a standard deviation of 0.7. When constructing a 97% confidence interval, which would be the most appropriate value of the critical value?
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Thirty randomly selected students took the calculus final. If the sample mean was 92 and the standard deviation was 9.4, construct a 99 percent confidence interval for the mean score of all students.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The 90% interval for a statistics test was given by 72 +- 7. What is the lower bound for the interval?
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following does NOT have an affect on the width of a confidence interval?
Tags
CCSS.HSS.IC.B.4
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