Question 1

Five percent of all credit card holders eventually become delinquent.The probability,rounded to four decimal places,that in a random sample of 21 credit card holders,exactly 3 will become delinquent is:

Accepted Answer

0.0660

Question 2

The mean number of accidents to occur at a busy intersection during a 24-hour period has a Poisson distribution.If the probability of no accidents during a 24-hour period is 0.1165,what is the mean number of accidents,rounded to two decimal places,per 24-hour period?

Accepted Answer

2.15

Question 3

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 exactly 1 complaints?

Accepted Answer

0.1596

Question 4

Use the following to answer questions :
The following table lists the probability distribution of a discrete random variable x:
 
-The probability that  is greater than or equal to 6 is:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 5

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

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 6

Which of the following is not a condition of the binomial experiment?

Accepted Answer

A)  There are only two trials
B)  Each trial has two and only two outcomes
C)  p is the probability of success,q is the probability of failure,and 
D)  The trials are independent

Question 7

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 less than 3 complaints?

Accepted Answer

The answer of Use the following to answer questions :
Historical...

Question 8

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

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 9

Use the following to answer questions :
The following table lists the probability distribution of a discrete random variable x:
 
-The probability that  is greater than 6 is:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 10

Let N = 15,r = 5,and n = 2.Using the hypergeometric probability distribution formula,find P(x  1).Round your answer to four decimal places.

Accepted Answer

The answer of Let N = 15,r = 5,and n...

Question 11

A Bernoulli trial is:

Accepted Answer

A)  the trial of a court case
B)  a repetition of a binomial experiment
C)  a repetition of a probability distribution
D)  the trial of a probability distribution

Question 12

The formula used to obtain the mean of a discrete random variable is:

Accepted Answer

A)   
B)   
C)   
D)

Question 13

For a discrete random variable x,the probability of any value of x is:

Accepted Answer

A)  always greater than 1
B)  always less than zero
C)  always in the range zero to 1
D)  never greater than zero

Question 14

For  3.5,the probability of P(x < 4),rounded to four decimal places,is:

Accepted Answer

The answer of For  3.5,the probability of P(x <...

Question 15

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

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 16

The number of small air bubbles per 3 feet by 3 feet plastic sheet has a Poisson distribution with a mean number of 2.8 per sheet.What percent of these sheets have no air bubbles?

Accepted Answer

The answer of The number of small air bubbles per...

Question 17

Which of the following is not a condition to apply the Poisson probability distribution?

Accepted Answer

A)  x is a discrete random variable
B)  There are n identical occurrences
C)  The occurrences are random
D)  The occurrences are independent

Question 18

A survey show that out of 1,000 households surveyed,392 own one car,432 own two cars,153 own three cars,and 23 own 4 or more cars.Construct the probability distribution for this data.

Accepted Answer

The answer of A survey show that out of 1,000...

Question 19

The binomial probability distribution is right-skewed if:

Accepted Answer

A)  p is 0.25 or smaller
B)  p is equal to 0.50
C)  p is less than 0.50
D)  p is greater than 0.50

Question 20

Which of the following is not a binomial experiment?

Accepted Answer

A)  Rolling a die 25 times and observing for an even or odd number
B)  Randomly selecting 50 items from a production line and observing if they are good or defective
C)  Rolling a die 20 times and observing for a number that is less than or equal to 4 or greater than 4
D)  Selecting 50 adults and observing if they are in favor of an issue,against it,or have no opinion

Exam 5: Discrete Random Variables and Their Probability Distribution

Five percent of all credit card holders eventually become delinquent.The probability,rounded to four decimal places,that in a random sample of 21 credit card holders,exactly 3 will become delinquent is:

The mean number of accidents to occur at a busy intersection during a 24-hour period has a Poisson distribution.If the probability of no accidents during a 24-hour period is 0.1165,what is the mean number of accidents,rounded to two decimal places,per 24-hour period?

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 exactly 1 complaints?

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that is greater than or equal to 6 is:

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

Which of the following is not a condition of the binomial experiment?

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 less than 3 complaints?

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

Use the following to answer questions : The following table lists the probability distribution of a discrete random variable x: -The probability that is greater than 6 is:

Let N = 15,r = 5,and n = 2.Using the hypergeometric probability distribution formula,find P(x 1).Round your answer to four decimal places.

A Bernoulli trial is:

The formula used to obtain the mean of a discrete random variable is:

For a discrete random variable x,the probability of any value of x is:

For 3.5,the probability of P(x < 4),rounded to four decimal places,is:

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

The number of small air bubbles per 3 feet by 3 feet plastic sheet has a Poisson distribution with a mean number of 2.8 per sheet.What percent of these sheets have no air bubbles?

Which of the following is not a condition to apply the Poisson probability distribution?

A survey show that out of 1,000 households surveyed,392 own one car,432 own two cars,153 own three cars,and 23 own 4 or more cars.Construct the probability distribution for this data.

The binomial probability distribution is right-skewed if:

Which of the following is not a binomial experiment?