Confidence Interval for Means

Quiz
•
Mathematics
•
12th Grade
•
Hard
Barbara White
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the margin of error for the interval (6.8, 12.9)?
9.85
3.05
3.50
6.8
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
7.
MULTIPLE CHOICE 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.
What is the Confidence Interval to one decimal place?
(114.5, 125.6)
(112.8, 127.4)
(112.82, 127.38)
(114.56, 125.64)
8.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
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