The amount of material used in making a custom sail for a sailboat is normally distributed with a ...

The amount of material used in making a custom sail for a sailboat is normally distributed with a standard deviation of 64 square feet. For a random sample of 15 sails, the mean amount of material used is 912 square feet.

Which of the following represents a 99 confidence interval for the population mean amount of material used in a custom sail?A) 912 49.2
B) 912 42.6
C) 912 44.3
D) 912 46.8

Q. 2

The listing of all possible outcomes of an experiment and their corresponding probability of occurrence is called a(n):

A) random variable.
B) objective probability.
C) probability distribution.
D) hypergeometric function.

Q. 3

Although the range measures the total spread of the data, the interquartile range (IQR) measures only the spread of the middle 50 of the data.

Indicate whether the statement is true or false

Q. 4

Your high school graduating class rank is an example of an ordinal scale.

Indicate whether the statement is true or false

Q. 5

Which of the following best describes the addition rule of probabilities?

A) P(A B) = P(A) + P(B)
B) P(A B) = P(A) + P(B) - P(A B)
C) P(A B) = P(A) + P(B) + P(A B)
D) P(A B) = P(A) P(B)

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The amount of material used in making a custom sail for a sailboat is normally distributed with a ...

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