Statistical Analysis Lesson 4
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Online Exam 4_04
Question 1 of 20
5.0 Points
The diameters of pencils produced by a certain machine are normally
distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches.
In a random sample of 460 pencils, approximately how many would you expect to
have a diameter less than 0.293 inches?
A. 123
B. 118
C. 112
D. 111
Question 2 of 20
5.0 Points
The weights of the fish in a certain lake are normally distributed with a
mean of 20 lb and a standard deviation of 6. If 9 fish are randomly selected,
what is the likelihood that the mean weight will be between 17.6 and 21.6 lb?
A. 0.9370
B. 0.6800
C. 0.6730
D. 0.0968
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