Exam 5: Discrete Random Variables and Their Probability Distribution

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 exactly two refrigerators is:

The standard deviation of a binomial distribution is equal to:

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

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

For 4.7,the probability of P(x > 3),rounded to four decimal places,is:

Which of the following is an example of a discrete random variable?

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

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 more than one refrigerator is:

Use the following to answer questions 34-35: The following table lists the probability distribution of a discrete random variable x: -The standard deviation of the random variable x,rounded to three decimal places,is:

The mean of a discrete random variable is its:

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that x is greater than 3 is:

For 4.7,the probability of x = 3,rounded to four decimal places,is:

The binomial probability distribution is left-skewed if:

The mean of a binomial distribution is equal to:

The standard deviation of a discrete random variable is the standard deviation of its:

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 or equal to 5 is:

Thirty-two percent of adults did not visit their physicians' offices last year.The probability,rounded to four decimal places,that in a random sample of 8 adults,exactly 3 will say they did not visit their physicians' offices last year is:

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 exactly 7 defective bolts?

Use the following to answer questions : The following table lists the probability distribution of the number of HD-TVs owned by all families in a city. -The mean number of HD-TVs owned by these families is:

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that assumes a value from 3 to 6 is: