Question 1

We would use a normal distribution to model the waiting time until the next Florida hurricane strike.

Accepted Answer

A) True 
 B)False

Question 2

A continuous uniform distribution U(0,800)will have μ = 400 and σ = 230.94.

Accepted Answer

A) True 
 B)False

Question 3

A machine dispenses water into a glass.Assuming that the amount of water dispensed follows a continuous uniform distribution from 10 ounces to 16 ounces,the average amount of water dispensed by the machine is

Accepted Answer

A) 12 ounces. 
B) 13 ounces. 
C) 14 ounces. 
D) 16 ounces. 
A) 12 ounces. 
B) 13 ounces. 
C) 14 ounces. 
D) 16 ounces.

Question 4

A random variable X is best described by a continuous uniform distribution from 20 to 45 inclusive.The mean of this distribution is

Accepted Answer

A) 30.5 
B) 31.5 
C) 32.5 
D) 33.5 
A) 30.5 
B) 31.5 
C) 32.5 
D) 33.5

Question 5

Any two normal curves are the same except for their

Accepted Answer

A) standard deviations. 
B) means. 
C) standard deviations and means. 
D) standard deviations,means,skewness,and kurtosis. 
A) standard deviations. 
B) means. 
C) standard deviations and means. 
D) standard deviations,means,skewness,and kurtosis.

Question 6

For which binomial distribution would a normal approximation be most acceptable?

Accepted Answer

A) n = 50,π = 0.05 
B) n = 100,π = 0.04 
C) n = 40,π = 0.25 
D) n = 400,π = 0.02 
A) n = 50,π = 0.05 
B) n = 100,π = 0.04 
C) n = 40,π = 0.25 
D) n = 400,π = 0.02

Question 7

If the random variable Z has a standard normal distribution,then P(Z ≤ −1.72)is

Accepted Answer

A) 0.9573 
B) 0.0446 
C) 0.5016 
D) 0.0427 
A) 0.9573 
B) 0.0446 
C) 0.5016 
D) 0.0427

Question 8

If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility is 4,000 operating hours,what is the probability of unscheduled maintenance in the next 5,000 hours?

Accepted Answer

A) 0.8000 
B) 0.7135 
C) 0.2865 
D) 0.5000 
A) 0.8000 
B) 0.7135 
C) 0.2865 
D) 0.5000

Question 9

The figure shows a normal N(400,23)distribution.Find the approximate shaded area.

Accepted Answer

A) 0.3811 
B) 0.3527 
C) 0.2299 
D) 0.1940 
A) 0.3811 
B) 0.3527 
C) 0.2299 
D) 0.1940

Question 10

The normal is a good approximation to the binomial when n is greater than or equal to 10.

Accepted Answer

A) True 
 B)False

Question 11

If the random variable Z has a standard normal distribution,then P(1.17 ≤ Z ≤ 2.26)is

Accepted Answer

A) 0.1091 
B) 0.1203 
C) 0.2118 
D) 0.3944 
A) 0.1091 
B) 0.1203 
C) 0.2118 
D) 0.3944

Question 12

In Melanie's Styling Salon,the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes.The slowest quartile of customers will require more than how many minutes for a simple haircut?

Accepted Answer

A) 3(n + 1)/4 minutes 
B) 26 minutes 
C) 25.7 minutes 
D) 27.7 minutes 
A) 3(n + 1)/4 minutes 
B) 26 minutes 
C) 25.7 minutes 
D) 27.7 minutes

Question 13

Excel's = RAND()function produces random numbers that are uniformly distributed between 0 and 1.The mean of this distribution is approximately

Accepted Answer

A) 0.5000 
B) 0.2500 
C) 0.3333 
D) 0.2887 
A) 0.5000 
B) 0.2500 
C) 0.3333 
D) 0.2887

Question 14

Regarding continuous probability distributions,which statement is correct?

Accepted Answer

A) The exponential distribution may be skewed left or right. 
B) The uniform distribution is never skewed. 
C) The normal distribution is sometimes skewed. 
D) The standard normal distribution is platykurtic. 
A) The exponential distribution may be skewed left or right. 
B) The uniform distribution is never skewed. 
C) The normal distribution is sometimes skewed. 
D) The standard normal distribution is platykurtic.

We would use a normal distribution to model the waiting time until the next Florida hurricane strike.

A continuous uniform distribution U(0,800)will have μ = 400 and σ = 230.94.

A machine dispenses water into a glass.Assuming that the amount of water dispensed follows a continuous uniform distribution from 10 ounces to 16 ounces,the average amount of water dispensed by the machine is

A random variable X is best described by a continuous uniform distribution from 20 to 45 inclusive.The mean of this distribution is

Any two normal curves are the same except for their

For which binomial distribution would a normal approximation be most acceptable?

If the random variable Z has a standard normal distribution,then P(Z ≤ −1.72)is

If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility is 4,000 operating hours,what is the probability of unscheduled maintenance in the next 5,000 hours?

The figure shows a normal N(400,23)distribution.Find the approximate shaded area.

The normal is a good approximation to the binomial when n is greater than or equal to 10.

If the random variable Z has a standard normal distribution,then P(1.17 ≤ Z ≤ 2.26)is

In Melanie's Styling Salon,the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes.The slowest quartile of customers will require more than how many minutes for a simple haircut?

Excel's = RAND()function produces random numbers that are uniformly distributed between 0 and 1.The mean of this distribution is approximately

Regarding continuous probability distributions,which statement is correct?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters

Exam 7: Continuous Probability Distributions

We would use a normal distribution to model the waiting time until the next Florida hurricane strike.

A continuous uniform distribution U(0,800)will have μ = 400 and σ = 230.94.

A machine dispenses water into a glass.Assuming that the amount of water dispensed follows a continuous uniform distribution from 10 ounces to 16 ounces,the average amount of water dispensed by the machine is

A random variable X is best described by a continuous uniform distribution from 20 to 45 inclusive.The mean of this distribution is

Any two normal curves are the same except for their

For which binomial distribution would a normal approximation be most acceptable?

If the random variable Z has a standard normal distribution,then P(Z ≤ −1.72)is

If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility is 4,000 operating hours,what is the probability of unscheduled maintenance in the next 5,000 hours?

The figure shows a normal N(400,23)distribution.Find the approximate shaded area.

The normal is a good approximation to the binomial when n is greater than or equal to 10.

If the random variable Z has a standard normal distribution,then P(1.17 ≤ Z ≤ 2.26)is

In Melanie's Styling Salon,the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes.The slowest quartile of customers will require more than how many minutes for a simple haircut?

Excel's = RAND()function produces random numbers that are uniformly distributed between 0 and 1.The mean of this distribution is approximately

Regarding continuous probability distributions,which statement is correct?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters