Question 1

z is a standard normal random variable.What is the value of z if the area to the right of z is 0.9803?

Accepted Answer

A)  -2.06 
B)  0.4803 
C)  -1.97 
D)  3.06 
A)  -2.06 
B)  0.4803 
C)  -1.97 
D)  3.06

Question 2

z is a standard normal random variable.The P(z > 2.11) equals

Accepted Answer

A)  0.4821 
B)  0.9821 
C)  0.5 
D)  0.0174 
A)  0.4821 
B)  0.9821 
C)  0.5 
D)  0.0174

Question 3

The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds.The probability of a player weighing less than 250 pounds is

Accepted Answer

A)  0.4772 
B)  0.9772 
C)  0.0528 
D)  0.5000 
A)  0.4772 
B)  0.9772 
C)  0.0528 
D)  0.5000

Question 4

A continuous probability distribution that is useful in describing the time, or space, between occurrences of an event is a(n)

Accepted Answer

A)  Normal probability distribution. 
B)  Uniform probability distribution. 
C)  Exponential probability distribution. 
D)  Poisson probability distribution. 
A)  Normal probability distribution. 
B)  Uniform probability distribution. 
C)  Exponential probability distribution. 
D)  Poisson probability distribution.

Question 5

​Whenever the probability is proportional to the length of the interval in which the random variable can assume a value, the random variable is

Accepted Answer

A)  ​Uniformly distributed. 
B)  Normally distributed. 
C)  ​Poisson distributed. 
D)  ​Exponentially distributed. 
A)  ​Uniformly distributed. 
B)  Normally distributed. 
C)  ​Poisson distributed. 
D)  ​Exponentially distributed.

Question 6

Which of the following probability distributions have the same value for mean, median, and mode​?

Accepted Answer

A)  Uniform 
B)  Normal 
C)  ​Exponential 
D)  ​Poisson 
A)  Uniform 
B)  Normal 
C)  ​Exponential 
D)  ​Poisson

Question 7

An experiment consists of measuring the speed of automobiles on a highway by the use of radar equipment.The random variable in this experiment is speed, measured in miles per hour.This random variable is a

Accepted Answer

A)  ​nominal random variable. 
B)  ​ordinal random variable. 
C)  ​discrete random variable. 
D)  ​continuous random variable. 
A)  ​nominal random variable. 
B)  ​ordinal random variable. 
C)  ​discrete random variable. 
D)  ​continuous random variable.

Question 8

The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.The probability that her trip will take longer than 60 minutes is

Accepted Answer

A)  1.00 
B)  0.40 
C)  0.02 
D)  0.60 
A)  1.00 
B)  0.40 
C)  0.02 
D)  0.60

Question 9

Given that z is a standard normal random variable, what is the value of z if the area to the left of z is 0.119?

Accepted Answer

A)  0.381 
B)  +1.18 
C)  -1.18 
D)  2.36 
A)  0.381 
B)  +1.18 
C)  -1.18 
D)  2.36

Question 10

For a standard normal distribution, the probability of obtaining a z value of less than 1.6 is

Accepted Answer

A)  0.1600 
B)  0.0160 
C)  0.0016 
D)  0.9452 
A)  0.1600 
B)  0.0160 
C)  0.0016 
D)  0.9452

Question 11

Given that z is a standard normal random variable, what is the value of z if the area to the right of z is 0.5?

Accepted Answer

A)  0.0000 
B)  1.0000 
C)  0.1915 
D)  0.3413 
A)  0.0000 
B)  1.0000 
C)  0.1915 
D)  0.3413

Question 12

A value of 0.5 that is added to and/or subtracted from a value of x when the continuous normal distribution is used to approximate the discrete binomial distribution is called

Accepted Answer

A)  probability density factor. 
B)  continuity correction factor. 
C)  factor of conversion. 
D)  continuity approximation factor. 
A)  probability density factor. 
B)  continuity correction factor. 
C)  factor of conversion. 
D)  continuity approximation factor.

Question 13

The assembly time for a product is uniformly distributed between 6 to 10 minutes.What is the value of probability density function in the interval between 6 and 10?

Accepted Answer

A)  0.25 
B)  4.00 
C)  5.00 
D)  0.00 
A)  0.25 
B)  4.00 
C)  5.00 
D)  0.00

Question 14

For a standard normal distribution, the probability of obtaining a z value between -2.4 to -2.0 is

Accepted Answer

A)  0.4000 
B)  0.0146 
C)  0.0400 
D)  0.5000 
A)  0.4000 
B)  0.0146 
C)  0.0400 
D)  0.5000

Question 15

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a standard deviation of 11.If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?

Accepted Answer

A)  70.39 
B)  67.39 
C)  50.39 
D)  65.39 
A)  70.39 
B)  67.39 
C)  50.39 
D)  65.39

Question 16

If the mean of a normal distribution is negative,

Accepted Answer

A)  the standard deviation must also be negative. 
B)  the variance must also be negative. 
C)  a mistake has been made in the computations, because the mean of a normal distribution cannot be negative. 
D)  none of these alternatives is correct. 
A)  the standard deviation must also be negative. 
B)  the variance must also be negative. 
C)  a mistake has been made in the computations, because the mean of a normal distribution cannot be negative. 
D)  none of these alternatives is correct.

Question 17

z is a standard normal random variable.The P (1.20 $\leq$   z $\leq$ 1.85) equals

Accepted Answer

A)  0.4678 
B)  0.3849 
C)  0.8527 
D)  0.0829 
A)  0.4678 
B)  0.3849 
C)  0.8527 
D)  0.0829

Question 18

What is the mean of x, given the function below  
f(x) =(1/10) e-x/10 x $\geq$ 0

Accepted Answer

A)  0.10 
B)  10 
C)  100 
D)  1,000 
A)  0.10 
B)  10 
C)  100 
D)  1,000

Question 19

Given that z is a standard normal random variable.What is the value of z if the area between -z and z is 0.754?

Accepted Answer

A)  $\pm$ 1.16 
B)  $\pm$ 1.96 
C)  $\pm$ 2.0 
D)  $\pm$ 11.6 
A)  $\pm$ 1.16 
B)  $\pm$ 1.96 
C)  $\pm$ 2.0 
D)  $\pm$ 11.6

Question 20

In a standard normal distribution, the range of values of z is from

Accepted Answer

A)  minus infinity to infinity. 
B)  -1 to 1. 
C)  0 to 1. 
D)  -3.09 to 3.09. 
A)  minus infinity to infinity. 
B)  -1 to 1. 
C)  0 to 1. 
D)  -3.09 to 3.09.

z is a standard normal random variable.What is the value of z if the area to the right of z is 0.9803?

z is a standard normal random variable.The P(z > 2.11) equals

The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds.The probability of a player weighing less than 250 pounds is

A continuous probability distribution that is useful in describing the time, or space, between occurrences of an event is a(n)

Whenever the probability is proportional to the length of the interval in which the random variable can assume a value, the random variable is

Which of the following probability distributions have the same value for mean, median, and mode?

An experiment consists of measuring the speed of automobiles on a highway by the use of radar equipment.The random variable in this experiment is speed, measured in miles per hour.This random variable is a

The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.The probability that her trip will take longer than 60 minutes is

Given that z is a standard normal random variable, what is the value of z if the area to the left of z is 0.119?

For a standard normal distribution, the probability of obtaining a z value of less than 1.6 is

Given that z is a standard normal random variable, what is the value of z if the area to the right of z is 0.5?

A value of 0.5 that is added to and/or subtracted from a value of x when the continuous normal distribution is used to approximate the discrete binomial distribution is called

The assembly time for a product is uniformly distributed between 6 to 10 minutes.What is the value of probability density function in the interval between 6 and 10?

For a standard normal distribution, the probability of obtaining a z value between -2.4 to -2.0 is

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a standard deviation of 11.If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?

If the mean of a normal distribution is negative,

z is a standard normal random variable.The P (1.20 $\leq$ z $\leq$ 1.85) equals

What is the mean of x, given the function below f(x) =(1/10) e-x^/10 x $\geq$ 0

Given that z is a standard normal random variable.What is the value of z if the area between -z and z is 0.754?

In a standard normal distribution, the range of values of z is from

Data and Statistics

Descriptive Statistics: Tabulargraphical

Descriptive Statistics: Numerical

Introduction to Probability

Discrete Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 6: Continuous Probability Distributions

z is a standard normal random variable.What is the value of z if the area to the right of z is 0.9803?

z is a standard normal random variable.The P(z > 2.11) equals

The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds.The probability of a player weighing less than 250 pounds is

A continuous probability distribution that is useful in describing the time, or space, between occurrences of an event is a(n)

​Whenever the probability is proportional to the length of the interval in which the random variable can assume a value, the random variable is

Which of the following probability distributions have the same value for mean, median, and mode​?

An experiment consists of measuring the speed of automobiles on a highway by the use of radar equipment.The random variable in this experiment is speed, measured in miles per hour.This random variable is a

The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.The probability that her trip will take longer than 60 minutes is

Given that z is a standard normal random variable, what is the value of z if the area to the left of z is 0.119?

For a standard normal distribution, the probability of obtaining a z value of less than 1.6 is

Given that z is a standard normal random variable, what is the value of z if the area to the right of z is 0.5?

A value of 0.5 that is added to and/or subtracted from a value of x when the continuous normal distribution is used to approximate the discrete binomial distribution is called

The assembly time for a product is uniformly distributed between 6 to 10 minutes.What is the value of probability density function in the interval between 6 and 10?

For a standard normal distribution, the probability of obtaining a z value between -2.4 to -2.0 is

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a standard deviation of 11.If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?

If the mean of a normal distribution is negative,

z is a standard normal random variable.The P (1.20 ≤\leq≤ z ≤\leq≤ 1.85) equals

What is the mean of x, given the function below f(x) =(1/10) e-x/10 x ≥\geq≥ 0

Given that z is a standard normal random variable.What is the value of z if the area between -z and z is 0.754?

In a standard normal distribution, the range of values of z is from

Data and Statistics

Descriptive Statistics: Tabulargraphical

Descriptive Statistics: Numerical

Introduction to Probability

Discrete Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Whenever the probability is proportional to the length of the interval in which the random variable can assume a value, the random variable is

Which of the following probability distributions have the same value for mean, median, and mode?

z is a standard normal random variable.The P (1.20 $\leq$ z $\leq$ 1.85) equals

What is the mean of x, given the function below f(x) =(1/10) e-x^/10 x $\geq$ 0