Question 1

When sampling without replacement, the probability of obtaining a certain sample is best given by a _____.

Accepted Answer

A)  hypergeometric distribution 
B)  binomial distribution 
C)  Poisson distribution 
D)  normal distribution 
A)  hypergeometric distribution 
B)  binomial distribution 
C)  Poisson distribution 
D)  normal distribution

Question 2

A random variable that can assume only a finite number of values is referred to as a(n) _____.

Accepted Answer

A)  infinite sequence 
B)  finite sequence 
C)  discrete random variable 
D)  discrete probability function 
A)  infinite sequence 
B)  finite sequence 
C)  discrete random variable 
D)  discrete probability function

Question 3

Which of the following is a characteristic of a binomial experiment?

Accepted Answer

A)  At least two outcomes are possible. 
B)  The probability of success changes from trial to trial. 
C)  The trials are independent. 
D)  All of the answers are correct. 
A)  At least two outcomes are possible. 
B)  The probability of success changes from trial to trial. 
C)  The trials are independent. 
D)  All of the answers are correct.

Question 4

Excel's HYPGEOM.DIST function has how many inputs?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 5

To compute the probability that in a random sample of n elements, selected without replacement, we will obtain x successes, we would use the _____.

Accepted Answer

A)  binomial probability distribution 
B)  Poisson probability distribution 
C)  hypergeometric probability distribution 
D)  exponential probability distribution 
A)  binomial probability distribution 
B)  Poisson probability distribution 
C)  hypergeometric probability distribution 
D)  exponential probability distribution

Question 6

Which of the following properties of a binomial experiment is called the stationarity?

Accepted Answer

A)  The experiment consists of n identical trials. 
B)  Two outcomes are possible on each trial. 
C)  The probability of success is the same for each trial. 
D)  The trials are independent. 
A)  The experiment consists of n identical trials. 
B)  Two outcomes are possible on each trial. 
C)  The probability of success is the same for each trial. 
D)  The trials are independent.

Question 7

If you are conducting an experiment where the probability of a success is .02 and you are interested in the probability of two successes in 15 trials, the correct probability function to use is the _____.

Accepted Answer

A)  standard normal probability density function 
B)  normal probability density function 
C)  Poisson probability function 
D)  binomial probability function 
A)  standard normal probability density function 
B)  normal probability density function 
C)  Poisson probability function 
D)  binomial probability function

Question 8

In a binomial experiment, the probability of success is .06. What is the probability of two successes in seven trials?

Accepted Answer

A)  .0036 
B)  .06 
C)  .0554 
D)  .28 
A)  .0036 
B)  .06 
C)  .0554 
D)  .28

Question 9

In a binomial experiment, the _____.

Accepted Answer

A)  probability of success does not change from trial to trial 
B)  probability of success does change from trial to trial 
C)  probability of success could change from trial to trial, depending on the situation under consideration 
D)  All of the answers are correct. 
A)  probability of success does not change from trial to trial 
B)  probability of success does change from trial to trial 
C)  probability of success could change from trial to trial, depending on the situation under consideration 
D)  All of the answers are correct.

Question 10

Highway patrol officers measure the speed of automobiles on a highway using radar equipment. The random variable in this experiment is speed, measured in miles per hour. This random variable is a _____.

Accepted Answer

A)  discrete random variable 
B)  continuous random variable 
C)  complex random variable 
D)  None of the answers is correct. 
A)  discrete random variable 
B)  continuous random variable 
C)  complex random variable 
D)  None of the answers is correct.

Question 11

The standard deviation is the _____.

Accepted Answer

A)  variance squared 
B)  square root of the sum of the deviations from the mean 
C)  same as the expected value 
D)  positive square root of the variance 
A)  variance squared 
B)  square root of the sum of the deviations from the mean 
C)  same as the expected value 
D)  positive square root of the variance

Question 12

When dealing with the number of occurrences of an event over a specified interval of time or space and when the occurrence or nonoccurrence in any interval is independent of the occurrence or nonoccurrence in any other interval, the appropriate probability distribution is a _____.

Accepted Answer

A)  binomial distribution 
B)  Poisson distribution 
C)  normal distribution 
D)  hypergeometric probability distribution 
A)  binomial distribution 
B)  Poisson distribution 
C)  normal distribution 
D)  hypergeometric probability distribution

Question 13

Excel's BINOM.DIST function has how many inputs?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 14

The expected value of a random variable is the _____.

Accepted Answer

A)  most probable value 
B)  simple average of all the possible values 
C)  median value 
D)  mean value 
A)  most probable value 
B)  simple average of all the possible values 
C)  median value 
D)  mean value

Question 15

The _____ probability function is based in part on the counting rule for combinations.

Accepted Answer

A)  uniform 
B)  Poisson 
C)  hypergeometric 
D)  exponential 
A)  uniform 
B)  Poisson 
C)  hypergeometric 
D)  exponential

Question 16

The standard deviation of a binomial distribution is _____.

Accepted Answer

A)  E(x) = pn(1 − n) 
B)  E(x) = np(1 − p) 
C)  E(x) = np 
D)  None of the answers is correct. 
A)  E(x) = pn(1 − n) 
B)  E(x) = np(1 − p) 
C)  E(x) = np 
D)  None of the answers is correct.

Question 17

To compute a binomial probability. we must know all of the following except the _____.

Accepted Answer

A)  probability of success 
B)  number of elements in the population 
C)  number of trials 
D)  value of the random variable 
A)  probability of success 
B)  number of elements in the population 
C)  number of trials 
D)  value of the random variable

Question 18

A weighted average of the value of a random variable, where the probability function provides weights, is known as _____.

Accepted Answer

A)  a probability function 
B)  a random variable 
C)  the expected value 
D)  None of the answers is correct. 
A)  a probability function 
B)  a random variable 
C)  the expected value 
D)  None of the answers is correct.

Question 19

The variance for the binomial probability distribution is _____.

Accepted Answer

A)  Var(x) = p(1 − p) 
B)  Var(x) = np 
C)  Var(x) = n(1 − p) 
D)  Var(x) = np(1 − p) 
A)  Var(x) = p(1 − p) 
B)  Var(x) = np 
C)  Var(x) = n(1 − p) 
D)  Var(x) = np(1 − p)

Question 20

A description of how the probabilities are distributed over the values the random variable can assume is called a(n) _____.

Accepted Answer

A)  probability distribution 
B)  probability function 
C)  random variable 
D)  expected value 
A)  probability distribution 
B)  probability function 
C)  random variable 
D)  expected value

Exam 5: Discrete Probability Distributions

When sampling without replacement, the probability of obtaining a certain sample is best given by a _____.

A random variable that can assume only a finite number of values is referred to as a(n) _____.

Which of the following is a characteristic of a binomial experiment?

Excel's HYPGEOM.DIST function has how many inputs?

To compute the probability that in a random sample of n elements, selected without replacement, we will obtain x successes, we would use the _____.

Which of the following properties of a binomial experiment is called the stationarity?

If you are conducting an experiment where the probability of a success is .02 and you are interested in the probability of two successes in 15 trials, the correct probability function to use is the _____.

In a binomial experiment, the probability of success is .06. What is the probability of two successes in seven trials?

In a binomial experiment, the _____.

Highway patrol officers measure the speed of automobiles on a highway using radar equipment. The random variable in this experiment is speed, measured in miles per hour. This random variable is a _____.

The standard deviation is the _____.

When dealing with the number of occurrences of an event over a specified interval of time or space and when the occurrence or nonoccurrence in any interval is independent of the occurrence or nonoccurrence in any other interval, the appropriate probability distribution is a _____.

Excel's BINOM.DIST function has how many inputs?

The expected value of a random variable is the _____.

The _____ probability function is based in part on the counting rule for combinations.

The standard deviation of a binomial distribution is _____.

To compute a binomial probability. we must know all of the following except the _____.

A weighted average of the value of a random variable, where the probability function provides weights, is known as _____.

The variance for the binomial probability distribution is _____.

A description of how the probabilities are distributed over the values the random variable can assume is called a(n) _____.

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit, Independence, and Multiple Proportions

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

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