Question 1

If a complimentary outcome has a 1 in 10 chance of occurrence,then the probability of that outcome is p = .10.

Accepted Answer

A) True 
 B)False

Question 2

If the variance of a probability distribution is 121,then the standard deviation is

Accepted Answer

A) 121 
B) 21 
C) 12 
D) 11 
A) 121 
B) 21 
C) 12 
D) 11

Question 3

The probability that someone in the human population has blood type AB is about p = .08;the probability that someone has blood type O is about p = .25.Knowing that each individual can have one and only one blood type,what is the probability that a person has an AB or O blood type?

Accepted Answer

A) .33 
B) .02 
C) 1.00 
D) This state of affairs is not possible. 
A) .33 
B) .02 
C) 1.00 
D) This state of affairs is not possible.

Question 4

The expected value of a random variable is the mean of a probability distribution.

Accepted Answer

A) True 
 B)False

Question 5

Probability distributions display the probability of each possible outcome for a given random variable.

Accepted Answer

A) True 
 B)False

Question 6

Below is the probability distribution for random variable x.What is the standard deviation of this probability distribution?

Accepted Answer

A) 0.48 
B) 0.69 
C) 0.24 
D) 2.00 
A) 0.48 
B) 0.69 
C) 0.24 
D) 2.00

Question 7

Bayes' theorem is often applied to a variety of ________ probability situations,including those related to statistical inference.

Accepted Answer

A) generic 
B) absolute 
C) conditional 
D) fixed 
A) generic 
B) absolute 
C) conditional 
D) fixed

Question 8

Below is the probability distribution for random variable x.Which of the following is most probable?

Accepted Answer

A) a score of at most 13 
B) a score of at least 13 
C) a score of 12 
D) a score of 14 
A) a score of at most 13 
B) a score of at least 13 
C) a score of 12 
D) a score of 14

Question 9

Probability ranges between 0 and 1 and is never negative.

Accepted Answer

A) True 
 B)False

Question 10

A probability can be stated as a proportion.

Accepted Answer

A) True 
 B)False

Question 11

A researcher determines the probability that a research study will reveal something new is p = .80.What is the probability that the study will reveal something new or not reveal something new?

Accepted Answer

A) .80 
B) .64 
C) 1.00 
D) .16 
A) .80 
B) .64 
C) 1.00 
D) .16

Question 12

Conditional outcomes refer to those where the probability of one outcome is independent of the probability of the occurrence of the second outcome.

Accepted Answer

A) True 
 B)False

Question 13

Each of the following is an example of a binomial distribution,except

Accepted Answer

A) the number of heads in ten flips of a fair coin 
B) the number of males and females in a sample 
C) the number of votes for or against a candidate 
D) the time it takes to complete a driving test 
A) the number of heads in ten flips of a fair coin 
B) the number of males and females in a sample 
C) the number of votes for or against a candidate 
D) the time it takes to complete a driving test

Question 14

A researcher records the number of buckets of popcorn purchased by patrons during one night at the movies.She finds that the probability that a patron purchased 0 buckets of popcorn is p = .27;1 bucket is p = .51;2 buckets is p = .17;and 3 buckets is p = .05.How many buckets of popcorn can we expect a patron to purchase per night at the movies in the long run?

Accepted Answer

A) exactly 1 bucket of popcorn per night 
B) more than 1 bucket of popcorn per night 
C) less than one bucket of popcorn per night 
D) none of the above 
A) exactly 1 bucket of popcorn per night 
B) more than 1 bucket of popcorn per night 
C) less than one bucket of popcorn per night 
D) none of the above

Question 15

If there are 13 heart cards in a deck of 52 cards,then what is the probability of selecting one heart card on a single draw from the deck of cards?

Accepted Answer

A) 13/52 
B) 1/52 
C) 26/52 
D) 1/13 
A) 13/52 
B) 1/52 
C) 26/52 
D) 1/13

Question 16

In a game,the probability of winning money is p = .16,the probability of losing money is p = .54,and the probability of breaking even is p = .30.What is the probability of winning or losing money in this game?

Accepted Answer

A) .16 
B) .54 
C) .70 
D) 1.00 
A) .16 
B) .54 
C) .70 
D) 1.00

Question 17

A researcher states that the probability of getting into an accident on a busy road is .09.Hence,the probability of getting into an accident twice on a busy road is .18.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is a mathematical formula that relates the conditional and marginal (unconditional)probabilities of two conditional outcomes that occur at random?

Accepted Answer

A) Bayes' theorem 
B) simple probability 
C) random event sampling 
D) descriptive statistics 
A) Bayes' theorem 
B) simple probability 
C) random event sampling 
D) descriptive statistics

Question 19

Which of the following is NOT a characteristic of probability?

Accepted Answer

A) Probability varies between 0 and 1. 
B) Probability can never be negative. 
C) Probability can be stated as a fraction or decimal. 
D) Probability is most useful for describing fixed events. 
A) Probability varies between 0 and 1. 
B) Probability can never be negative. 
C) Probability can be stated as a fraction or decimal. 
D) Probability is most useful for describing fixed events.

Question 20

The proportion or fraction of times an outcome is likely to occur is referred to as

Accepted Answer

A) probability 
B) a random event 
C) sample space 
D) luck 
A) probability 
B) a random event 
C) sample space 
D) luck

If a complimentary outcome has a 1 in 10 chance of occurrence,then the probability of that outcome is p = .10.

If the variance of a probability distribution is 121,then the standard deviation is

The probability that someone in the human population has blood type AB is about p = .08;the probability that someone has blood type O is about p = .25.Knowing that each individual can have one and only one blood type,what is the probability that a person has an AB or O blood type?

The expected value of a random variable is the mean of a probability distribution.

Probability distributions display the probability of each possible outcome for a given random variable.

Below is the probability distribution for random variable x.What is the standard deviation of this probability distribution?

Bayes' theorem is often applied to a variety of ________ probability situations,including those related to statistical inference.

Below is the probability distribution for random variable x.Which of the following is most probable?

Probability ranges between 0 and 1 and is never negative.

A probability can be stated as a proportion.

A researcher determines the probability that a research study will reveal something new is p = .80.What is the probability that the study will reveal something new or not reveal something new?

Conditional outcomes refer to those where the probability of one outcome is independent of the probability of the occurrence of the second outcome.

Each of the following is an example of a binomial distribution,except

If there are 13 heart cards in a deck of 52 cards,then what is the probability of selecting one heart card on a single draw from the deck of cards?

In a game,the probability of winning money is p = .16,the probability of losing money is p = .54,and the probability of breaking even is p = .30.What is the probability of winning or losing money in this game?

A researcher states that the probability of getting into an accident on a busy road is .09.Hence,the probability of getting into an accident twice on a busy road is .18.

Which of the following is a mathematical formula that relates the conditional and marginal (unconditional)probabilities of two conditional outcomes that occur at random?

Which of the following is NOT a characteristic of probability?

The proportion or fraction of times an outcome is likely to occur is referred to as

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

Exam 5: Probability

If a complimentary outcome has a 1 in 10 chance of occurrence,then the probability of that outcome is p = .10.

If the variance of a probability distribution is 121,then the standard deviation is

The probability that someone in the human population has blood type AB is about p = .08;the probability that someone has blood type O is about p = .25.Knowing that each individual can have one and only one blood type,what is the probability that a person has an AB or O blood type?

The expected value of a random variable is the mean of a probability distribution.

Probability distributions display the probability of each possible outcome for a given random variable.

Below is the probability distribution for random variable x.What is the standard deviation of this probability distribution?

Bayes' theorem is often applied to a variety of ________ probability situations,including those related to statistical inference.

Below is the probability distribution for random variable x.Which of the following is most probable?

Probability ranges between 0 and 1 and is never negative.

A probability can be stated as a proportion.

A researcher determines the probability that a research study will reveal something new is p = .80.What is the probability that the study will reveal something new or not reveal something new?

Conditional outcomes refer to those where the probability of one outcome is independent of the probability of the occurrence of the second outcome.

Each of the following is an example of a binomial distribution,except

If there are 13 heart cards in a deck of 52 cards,then what is the probability of selecting one heart card on a single draw from the deck of cards?

In a game,the probability of winning money is p = .16,the probability of losing money is p = .54,and the probability of breaking even is p = .30.What is the probability of winning or losing money in this game?

A researcher states that the probability of getting into an accident on a busy road is .09.Hence,the probability of getting into an accident twice on a busy road is .18.

Which of the following is a mathematical formula that relates the conditional and marginal (unconditional)probabilities of two conditional outcomes that occur at random?

Which of the following is NOT a characteristic of probability?

The proportion or fraction of times an outcome is likely to occur is referred to as

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters