Question 1

In a uniform probability distribution, P(x) is constant between the distribution's minimum and maximum values.

Accepted Answer

A) True 
 B)False

Question 2

The area under the normal curve within plus and minus one standard deviation of the mean is about 68.26%.

Accepted Answer

A) True 
 B)False

Question 3

The standard deviation of any uniform probability distribution is

Accepted Answer

A)  (b - a)/2 
B)  n(1 - $\pi$) 
C)    
D)    
A)  (b - a)/2 
B)  n(1 - $\pi$) 
C)    
D)

Question 4

A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 ($\pi$=0.50). 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)  2.404 
B)  2.546 
C)  2.687 
D)  0.50 
A)  2.404 
B)  2.546 
C)  2.687 
D)  0.50

Question 5

Some normal probability distributions have equal arithmetic means, but their standard deviations may be different.

Accepted Answer

A) True 
 B)False

Question 6

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. It has been suggested that the normal approximation to the binomial be used to calculate various probabilities. In this problem, can the normal approximation to the binomial be applied? Explain.

Accepted Answer

Yes, n@#LAT-DLM& = 500(.25) =

Question 7

Describe the uniform distribution.

Accepted Answer

Its shape is rectangular.
It i

Question 8

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 150 or more of the new members are novice tennis players?

Accepted Answer

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

Question 9

The weekly mean income of a group of executives is $1000 and the standard deviation of this group is $100. The distribution is normal. What percent of the executives have an income of $925 or less?

Accepted Answer

A)  About 15% 
B)  About 85% 
C)  About 50% 
D)  About 23% 
A)  About 15% 
B)  About 85% 
C)  About 50% 
D)  About 23%

Question 10

The shape of any uniform probability distribution is

Accepted Answer

A)  Negatively skewed 
B)  Positively skewed 
C)  Rectangular 
D)  Bell shaped 
A)  Negatively skewed 
B)  Positively skewed 
C)  Rectangular 
D)  Bell shaped

Question 11

An accelerated life test on a large number of type-D alkaline batteries revealed that the mean life for a particular use before they failed is 19.0 hours. The distribution of the lives approximated a normal distribution. The standard deviation of the distribution was 1.2 hours. About 95.44 percent of the batteries failed between what two values?

Accepted Answer

A)  8.9 and 18.9 
B)  12.2 and 14.2 
C)  14.1 and 22.1 
D)  16.6 and 21.4 
A)  8.9 and 18.9 
B)  12.2 and 14.2 
C)  14.1 and 22.1 
D)  16.6 and 21.4

Question 12

The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the mean?

Accepted Answer

A)  120 minutes 
B)  150 minutes 
C)  135 minutes 
D)  270 minutes 
A)  120 minutes 
B)  150 minutes 
C)  135 minutes 
D)  270 minutes

Question 13

After arriving at the university student medical clinic, the waiting times to receive service after checking-in follow an exponential distribution with a mean of 10 minutes. Calculate the probability a student waits less than 6 minutes.

Accepted Answer

The answer of After arriving at the university student medical...

Question 14

The average score of 100 students taking a statistics final was 70 with a standard deviation of 7. Assuming a normal distribution, what is the probability that a student scored greater than 65?

Accepted Answer

A)  0.2611 
B)  0.2389 
C)  0.7611 
D)  -0.714 
A)  0.2611 
B)  0.2389 
C)  0.7611 
D)  -0.714

Question 15

For a standard normal distribution, what is the probability that z is greater than 1.75?

Accepted Answer

A)  0.0401 
B)  0.0459 
C)  0.4599 
D)  0.9599 
A)  0.0401 
B)  0.0459 
C)  0.4599 
D)  0.9599

Question 16

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the average monthly amount charged? _______

Accepted Answer

The answer of A major credit card company has determined...

Question 17

In a standard normal distribution, µ = ______ and $\sigma$ = _____.

Accepted Answer

The answer of In a standard normal distribution, µ =...

Question 18

What proportion of the area under a normal curve is to the right of a z-score of zero? _________

Accepted Answer

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

Question 19

For the exponential distribution, the mean and standard deviation are equal.

Accepted Answer

A) True 
 B)False

Question 20

What is the purpose of using the continuity correction factor when approximating the binomial distribution with a normal distribution?

Accepted Answer

When using the normal distribution to ap

In a uniform probability distribution, P(x) is constant between the distribution's minimum and maximum values.

The area under the normal curve within plus and minus one standard deviation of the mean is about 68.26%.

The standard deviation of any uniform probability distribution is

A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 ( $\pi$ =0.50). 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?

Some normal probability distributions have equal arithmetic means, but their standard deviations may be different.

Describe the uniform distribution.

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 150 or more of the new members are novice tennis players?

The weekly mean income of a group of executives is $1000 and the standard deviation of this group is $100. The distribution is normal. What percent of the executives have an income of $925 or less?

The shape of any uniform probability distribution is

The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the mean?

After arriving at the university student medical clinic, the waiting times to receive service after checking-in follow an exponential distribution with a mean of 10 minutes. Calculate the probability a student waits less than 6 minutes.

The average score of 100 students taking a statistics final was 70 with a standard deviation of 7. Assuming a normal distribution, what is the probability that a student scored greater than 65?

For a standard normal distribution, what is the probability that z is greater than 1.75?

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the average monthly amount charged? _______

In a standard normal distribution, µ = __ and $\sigma$ = _.

What proportion of the area under a normal curve is to the right of a z-score of zero? _________

For the exponential distribution, the mean and standard deviation are equal.

What is the purpose of using the continuity correction factor when approximating the binomial distribution with a normal distribution?

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

In a uniform probability distribution, P(x) is constant between the distribution's minimum and maximum values.

The area under the normal curve within plus and minus one standard deviation of the mean is about 68.26%.

The standard deviation of any uniform probability distribution is

A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 ( π\piπ =0.50). 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?

Some normal probability distributions have equal arithmetic means, but their standard deviations may be different.

Describe the uniform distribution.

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 150 or more of the new members are novice tennis players?

The weekly mean income of a group of executives is $1000 and the standard deviation of this group is $100. The distribution is normal. What percent of the executives have an income of $925 or less?

The shape of any uniform probability distribution is

The time to fly between New York City and Chicago is uniformly distributed with a minimum of 120 minutes and a maximum of 150 minutes. What is the mean?

After arriving at the university student medical clinic, the waiting times to receive service after checking-in follow an exponential distribution with a mean of 10 minutes. Calculate the probability a student waits less than 6 minutes.

The average score of 100 students taking a statistics final was 70 with a standard deviation of 7. Assuming a normal distribution, what is the probability that a student scored greater than 65?

For a standard normal distribution, what is the probability that z is greater than 1.75?

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the average monthly amount charged? _______

In a standard normal distribution, µ = ______ and σ\sigmaσ = _____.

What proportion of the area under a normal curve is to the right of a z-score of zero? _________

For the exponential distribution, the mean and standard deviation are equal.

What is the purpose of using the continuity correction factor when approximating the binomial distribution with a normal distribution?

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 50 trials (n = 50) with a probability of success of 0.50 ( $\pi$ =0.50). 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?

In a standard normal distribution, µ = __ and $\sigma$ = _.