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Exam 5: Discrete Random Variables and Their Probability Distribution

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Question 41

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Let N = 15,r = 6,and n = 4.Using the hypergeometric probability distribution formula,find P(x = 0).Round your answer to four decimal places.

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Question 42

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Use the following to answer questions : The following table lists the probability distribution of the number of refrigerators owned by all families in a city. -The probability that a randomly selected family owns at least two refrigerators is:

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Question 43

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Let N = 10,r = 6,and n = 7.Using the hypergeometric probability distribution formula,find P(x = 0).Round your answer to four decimal places.

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that is less than 4 is:

The mean of a discrete random variable is the mean of its:

The probability distribution table of a discrete random variable lists:

Sixty percent of all children in a school do not have cavities.The probability,rounded to four decimal places,that in a random sample of 9 children selected from this school,at least 4 do not have cavities is:

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that x assumes a value from 2 to 5 is:

The hypergeometric probability distribution can be used whenever:

The parameter(s) of the Poisson probability distribution is(are) :

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that x is less than 5 is:

A survey of 1,000 households gives the probability distribution: Is this a valid probability distribution?

Use the following to answer questions : A manufacturer packages bolts in boxes containing 100 each.Each box of 100 bolts contains,on average,6 defective bolts.The quality control staff randomly selects a box at the end of the day from an entire production run. -What is the probability,rounded to four decimal places,that the box will contain less than 7 defective bolts?

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that is less than or equal to 4 is:

A random variable is a variable whose value is determined by the:

Use the following to answer questions : Historical data indicates that Rickenbacker Airlines receives an average of 2.9 complaints per day. -What is the probability,rounded to four decimal places,that on a given day,Rickenbacker Airlines will receive at least 5 complaints?

Which of the following is true for the probability of a discrete random variable x?