Question 1

What is special about the standard normal distribution?

Accepted Answer

The mean is zero and

Question 2

For the standard normal distribution, what z-score corresponds with the 85% percentile? _________

Accepted Answer

The answer of For the standard normal distribution, what z-score...

Question 3

If an average of 12 customers are served per hour, then one customer arrives every

Accepted Answer

A)  12 minutes 
B)  60 minutes 
C)  5 minutes 
D)  10 minutes 
A)  12 minutes 
B)  60 minutes 
C)  5 minutes 
D)  10 minutes

Question 4

In a uniform distribution, with a minimum, a, and maximum, b, the probability that the random variable, x, is between a and b is ___________.

Accepted Answer

The answer of In a uniform distribution, with a minimum,...

Question 5

A binomial distribution has 100 trials (n = 100) with a probability of success of 0.25 ($\pi$=0.25). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used?

Accepted Answer

A)  2.079 
B)  2.194 
C)  1.963 
D)  0.25 
A)  2.079 
B)  2.194 
C)  1.963 
D)  0.25

Question 6

The exponential distribution is a probability distribution for a random variable measured as a rate of an event occurring.

Accepted Answer

A) True 
 B)False

Question 7

If an average of 60 customers are served per hour, then one customer arrives every

Accepted Answer

A)  1 minute 
B)  60 minutes 
C)  12 minutes 
D)  10 minutes 
A)  1 minute 
B)  60 minutes 
C)  12 minutes 
D)  10 minutes

Question 8

How is the standard deviation of a uniform distribution computed? _________

Accepted Answer

The answer of How is the standard deviation of a...

Question 9

The total area of a normal probability distribution is

Accepted Answer

A)  between -3.0 and 3.0. 
B)  1.00. 
C)  dependent on a value of 'z'. 
D)  approximated by the binomial distribution. 
A)  between -3.0 and 3.0. 
B)  1.00. 
C)  dependent on a value of 'z'. 
D)  approximated by the binomial distribution.

Question 10

For the standard normal distribution, what z-score corresponds with the first quartile? _________

Accepted Answer

The answer of For the standard normal distribution, what z-score...

Question 11

What is a normal distribution with a mean of 0 and a standard deviation of 1 called?

Accepted Answer

A)  Frequency distribution 
B)  Z-score 
C)  Standard normal distribution 
D)  Binomial probability distribution 
A)  Frequency distribution 
B)  Z-score 
C)  Standard normal distribution 
D)  Binomial probability distribution

Question 12

What proportion of the area under a normal curve is to the left of z = 1.40? ________

Accepted Answer

The answer of What proportion of the area under a...

Question 13

The shape of the uniform distribution is ____________.

Accepted Answer

The answer of The shape of the uniform distribution is...

Question 14

For any uniform probability distribution, the mean and standard deviation can be computed by knowing the maximum and minimum values of the random variable.

Accepted Answer

A) True 
 B)False

Question 15

If an average of 12 customers is served per hour, what is the probability that the next customer will arrive in 3 minutes or less?

Accepted Answer

A)  0.55 
B)  0.30 
C)  0.45 
D)  0.39 
A)  0.55 
B)  0.30 
C)  0.45 
D)  0.39

Question 16

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. How many students earned between $27,000 and $33,000? ______

Accepted Answer

The answer of A sample of 500 evening students revealed...

Question 17

Two normal distributions are compared. One has a mean of 10 and a standard deviation of 10. The second normal distribution has a mean of 10 and a standard deviation of 2. Which of the following is true?

Accepted Answer

A)  The locations of the distributions are different 
B)  The distributions are from two different families of distributions 
C)  The dispersions of the distributions are different 
D)  The dispersions of the distributions are the same 
A)  The locations of the distributions are different 
B)  The distributions are from two different families of distributions 
C)  The dispersions of the distributions are different 
D)  The dispersions of the distributions are the same

Question 18

Which of the following is true in a normal distribution?

Accepted Answer

A)  The mean equals zero. 
B)  Mode and the 3rd quartile are equal. 
C)  Mean divides the distribution into two equal parts. 
D)  The area under the curve is 0.68. 
A)  The mean equals zero. 
B)  Mode and the 3rd quartile are equal. 
C)  Mean divides the distribution into two equal parts. 
D)  The area under the curve is 0.68.

Question 19

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section.   What is the z-score of the student from section 1? _____________

Accepted Answer

The answer of Two business major students, in two different...

Question 20

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the probability that between 110 and 130 of the new members are novice tennis players?

Accepted Answer

The answer of A study conducted by a local tennis...

What is special about the standard normal distribution?

For the standard normal distribution, what z-score corresponds with the 85% percentile? _________

If an average of 12 customers are served per hour, then one customer arrives every

In a uniform distribution, with a minimum, a, and maximum, b, the probability that the random variable, x, is between a and b is ___________.

A binomial distribution has 100 trials (n = 100) with a probability of success of 0.25 ( $\pi$ =0.25). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used?

The exponential distribution is a probability distribution for a random variable measured as a rate of an event occurring.

If an average of 60 customers are served per hour, then one customer arrives every

How is the standard deviation of a uniform distribution computed? _________

The total area of a normal probability distribution is

For the standard normal distribution, what z-score corresponds with the first quartile? _________

What is a normal distribution with a mean of 0 and a standard deviation of 1 called?

What proportion of the area under a normal curve is to the left of z = 1.40? ________

The shape of the uniform distribution is ____________.

For any uniform probability distribution, the mean and standard deviation can be computed by knowing the maximum and minimum values of the random variable.

If an average of 12 customers is served per hour, what is the probability that the next customer will arrive in 3 minutes or less?

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. How many students earned between $27,000 and $33,000? ______

Two normal distributions are compared. One has a mean of 10 and a standard deviation of 10. The second normal distribution has a mean of 10 and a standard deviation of 2. Which of the following is true?

Which of the following is true in a normal distribution?

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section. What is the z-score of the student from section 1? _____________

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the probability that between 110 and 130 of the new members are novice tennis players?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete 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

Correlation and Linear Regression

Multiple Regression Analysis

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

Exam 7: Continuous Probability Distributions

What is special about the standard normal distribution?

For the standard normal distribution, what z-score corresponds with the 85% percentile? _________

If an average of 12 customers are served per hour, then one customer arrives every

In a uniform distribution, with a minimum, a, and maximum, b, the probability that the random variable, x, is between a and b is ___________.

A binomial distribution has 100 trials (n = 100) with a probability of success of 0.25 ( π\piπ =0.25). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used?

The exponential distribution is a probability distribution for a random variable measured as a rate of an event occurring.

If an average of 60 customers are served per hour, then one customer arrives every

How is the standard deviation of a uniform distribution computed? _________

The total area of a normal probability distribution is

For the standard normal distribution, what z-score corresponds with the first quartile? _________

What is a normal distribution with a mean of 0 and a standard deviation of 1 called?

What proportion of the area under a normal curve is to the left of z = 1.40? ________

The shape of the uniform distribution is ____________.

For any uniform probability distribution, the mean and standard deviation can be computed by knowing the maximum and minimum values of the random variable.

If an average of 12 customers is served per hour, what is the probability that the next customer will arrive in 3 minutes or less?

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. How many students earned between $27,000 and $33,000? ______

Two normal distributions are compared. One has a mean of 10 and a standard deviation of 10. The second normal distribution has a mean of 10 and a standard deviation of 2. Which of the following is true?

Which of the following is true in a normal distribution?

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section. What is the z-score of the student from section 1? _____________

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the probability that between 110 and 130 of the new members are novice tennis players?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete 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

Correlation and Linear Regression

Multiple Regression Analysis

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

A binomial distribution has 100 trials (n = 100) with a probability of success of 0.25 ( $\pi$ =0.25). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used?