Question 1

Chances are 50-50 that a newborn baby will be a girl.For families with five children,what is the probability that all the children are girls?

Accepted Answer

A) 0.900 
B) 0.031 
C) 0.001 
D) 0.250 
A) 0.900 
B) 0.031 
C) 0.001 
D) 0.250 B

Question 2

The Poisson distribution or,the law of improbable events,is _______________ skewed.

Accepted Answer

positively

Question 3

For the following distribution,
 
-What is the mean of the distribution?

Accepted Answer

A) 1 
B) 2.5 
C) 1.604 
D) 3 
A) 1 
B) 2.5 
C) 1.604 
D) 3 C

Question 4

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month.
 
-What is the mean number of days absent?

Accepted Answer

A) 0.72 days 
B) 2.5 days 
C) 0.12 days 
D) 3 days 
A) 0.72 days 
B) 2.5 days 
C) 0.12 days 
D) 3 days

Question 5

If the variance is 3.6 grams,what is the standard deviation?

Accepted Answer

A) 0.6 
B) 1.897 
C) 6.0 
D) 12.96 
A) 0.6 
B) 1.897 
C) 6.0 
D) 12.96

Question 6

What must you know to develop a binomial probability distribution?

Accepted Answer

A) Probability of success 
B) Number of trials 
C) Number of successes 
D) a and b only 
E) a and c only 
A) Probability of success 
B) Number of trials 
C) Number of successes 
D) a and b only 
E) a and c only

Question 7

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution.
-What is the probability that on a randomly selected day she will have two messages?

Accepted Answer

A) 0.0067 
B) 0.0014 
C) 0.420 
D) 0.084 
A) 0.0067 
B) 0.0014 
C) 0.420 
D) 0.084

Question 8

In a binomial experiment,the probability of a _________ remains constant.

Accepted Answer

The answer of In a binomial experiment,the probability of a...

Question 9

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month.
 
-Given the probability distribution,which of the following predictions is correct?

Accepted Answer

A) 60% of the employees will have more than one day absent for a month. 
B) There is a 0.04 probability that an employee will be absent 1 day during a month. 
C) There is a 0.12 probability that an employee will be absent 2 days during a month. 
D) There is a 0.50 probability that an employee will be absent 0.72 days during a month. 
A) 60% of the employees will have more than one day absent for a month. 
B) There is a 0.04 probability that an employee will be absent 1 day during a month. 
C) There is a 0.12 probability that an employee will be absent 2 days during a month. 
D) There is a 0.50 probability that an employee will be absent 0.72 days during a month.

Question 10

The variance of a binomial distribution is found by $ \eta $ $\pi$ (1 -  $\pi$).

Accepted Answer

A) True 
 B)False

Question 11

The probability of a particular outcome must always be between 0 and 100 inclusive.

Accepted Answer

A) True 
 B)False

Question 12

In a Poisson distribution,the probability of success may vary from trial to trial.

Accepted Answer

A) True 
 B)False

Question 13

A true-false test consists of six questions.If you guess the answer to each question,what is the probability of getting all six questions correct?

Accepted Answer

A) 0 
B) 0.016 
C) 0.062 
D) 0.250 
A) 0 
B) 0.016 
C) 0.062 
D) 0.250

Question 14

A random variable is assigned nominal or numerical values based on the outcomes of an experiment.

Accepted Answer

A) True 
 B)False

Question 15

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution.
-What is the probability that on a randomly selected day she will have five messages?

Accepted Answer

A) 0.0067 
B) 0.875 
C) 0.175 
D) 1.0 
A) 0.0067 
B) 0.875 
C) 0.175 
D) 1.0

Question 16

David's gasoline station offers 4 cents off per gallon if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period twenty-five customers buy gasoline at this station.
-What is the probability that more than ten and less than fifteen customers pay in cash?

Accepted Answer

A) 0.541 
B) 0.401 
C) 0.380 
D) 0.562 
A) 0.541 
B) 0.401 
C) 0.380 
D) 0.562

Question 17

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution.
-What is the probability that on a randomly selected day she will have no messages?

Accepted Answer

A) 0.0067 
B) Zero 
C) 0.0335 
D) Impossible to have no messages 
A) 0.0067 
B) Zero 
C) 0.0335 
D) Impossible to have no messages

Question 18

A random variable with a Poisson distribution has one of _______ mutually exclusive values.

Accepted Answer

The answer of A random variable with a Poisson distribution...

Question 19

If  $\pi$ = 1/5 and n = 100,what is the standard deviation of this binomial distribution? _______

Accepted Answer

The answer of If  $\pi$ = 1/5 and n...

Question 20

A _______________ random variable can assume only a certain number of separated values.

Accepted Answer

The answer of A _______________ random variable can assume only...

Chances are 50-50 that a newborn baby will be a girl.For families with five children,what is the probability that all the children are girls?

The Poisson distribution or,the law of improbable events,is _______________ skewed.

For the following distribution, -What is the mean of the distribution?

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. -What is the mean number of days absent?

If the variance is 3.6 grams,what is the standard deviation?

What must you know to develop a binomial probability distribution?

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. -What is the probability that on a randomly selected day she will have two messages?

In a binomial experiment,the probability of a _________ remains constant.

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. -Given the probability distribution,which of the following predictions is correct?

The variance of a binomial distribution is found by $\eta$ $\pi$ (1 - $\pi$ ).

The probability of a particular outcome must always be between 0 and 100 inclusive.

In a Poisson distribution,the probability of success may vary from trial to trial.

A true-false test consists of six questions.If you guess the answer to each question,what is the probability of getting all six questions correct?

A random variable is assigned nominal or numerical values based on the outcomes of an experiment.

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. -What is the probability that on a randomly selected day she will have five messages?

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. -What is the probability that on a randomly selected day she will have no messages?

A random variable with a Poisson distribution has one of _______ mutually exclusive values.

If $\pi$ = 1/5 and n = 100,what is the standard deviation of this binomial distribution? _______

A _______________ random variable can assume only a certain number of separated values.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

Exam 6: Discrete Probability Distributions

Chances are 50-50 that a newborn baby will be a girl.For families with five children,what is the probability that all the children are girls?

The Poisson distribution or,the law of improbable events,is _______________ skewed.

For the following distribution, -What is the mean of the distribution?

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. -What is the mean number of days absent?

If the variance is 3.6 grams,what is the standard deviation?

What must you know to develop a binomial probability distribution?

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. -What is the probability that on a randomly selected day she will have two messages?

In a binomial experiment,the probability of a _________ remains constant.

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. -Given the probability distribution,which of the following predictions is correct?

The variance of a binomial distribution is found by η \eta η π\piπ (1 - π\piπ ).

The probability of a particular outcome must always be between 0 and 100 inclusive.

In a Poisson distribution,the probability of success may vary from trial to trial.

A true-false test consists of six questions.If you guess the answer to each question,what is the probability of getting all six questions correct?

A random variable is assigned nominal or numerical values based on the outcomes of an experiment.

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. -What is the probability that on a randomly selected day she will have five messages?

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. -What is the probability that on a randomly selected day she will have no messages?

A random variable with a Poisson distribution has one of _______ mutually exclusive values.

If π\piπ = 1/5 and n = 100,what is the standard deviation of this binomial distribution? _______

A _______________ random variable can assume only a certain number of separated values.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

The variance of a binomial distribution is found by $\eta$ $\pi$ (1 - $\pi$ ).

If $\pi$ = 1/5 and n = 100,what is the standard deviation of this binomial distribution? _______