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OPRE 6301 Exam 2 Questions and Answers- A graded
Exam (elaborations) • 10
pages
• 2023
A race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 48.5

seconds with a standard deviation of 1.47 seconds. A 95% confidence interval for the 0 to 60 time is

45.2 seconds to 51.8 seconds.

 True

 False

If all possible samples of size n are drawn from a normal population, the probability distribution of the

sample mean is a normal distribution.

 True

 False

A sample of size n is selected at random from an infinite population. As n increases, ...
OPRE 6301 Exam 2 Questions and Answers- A graded
Last document update:
ago
A race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 48.5

seconds with a standard deviation of 1.47 seconds. A 95% confidence interval for the 0 to 60 time is

45.2 seconds to 51.8 seconds.

 True

 False

If all possible samples of size n are drawn from a normal population, the probability distribution of the

sample mean is a normal distribution.

 True

 False

A sample of size n is selected at random from an infinite population. As n increases, ...