Exam 6: Discrete Probability Distributions

In Quebec,90 percent of the population subscribes to the Roman Catholic religion.In a random sample of eight Quebecois,find the probability that the sample contains at least five Roman Catholics.

(Multiple Choice)

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Question 101

The binomial distribution describes the number of:

(Multiple Choice)

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Question 102

On a particular Thursday in August,40 Grand Canyon tourists enter a drawing for a free mule ride.Ten of the entrants are European tourists.Five entrants are selected at random to get the free mule ride.Which model best describes the number of European tourists in the random sample?

(Multiple Choice)

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Question 103

The probability that an Oxnard University student is carrying a backpack is .70.If 10 students are observed at random,what is the probability that fewer than 7 will be carrying backpacks?

(Multiple Choice)

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Question 104

Hardluck Harry has a batting average of .200 (i.e. ,a 20 percent chance of a hit each time he's at bat).Scouts for a rival baseball club secretly observe Harry's performance in 12 random times at bat.What is the probability that Harry will get more than 2 hits?

(Multiple Choice)

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Question 105

A fair die is rolled.If it comes up 1 or 2 you win $2.If it comes up 3,4,5,or 6 you lose $1.Find the expected winnings.

(Multiple Choice)

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Question 106

As a rule of thumb,the binomial distribution can be used to approximate the hypergeometric distribution whenever the population is at least 20 times as large as the sample.

(True/False)

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Question 107

The number of male babies in a sample of 10 randomly chosen babies is a:

(Multiple Choice)

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Question 108

The discrete random variable X is the number of students that show up for Professor Smith's office hours on Monday afternoons.The table below shows the probability distribution for X.What is the probability that at least 1 student comes to office hours on any given Monday?

(Multiple Choice)

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Question 109

In a randomly chosen week,which probability model would you use to describe the number of accidents at the intersection of two streets?

(Multiple Choice)

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Question 110

When you send out a resume,the probability of being called for an interview is .20.What is the probability that the first interview occurs on the fourth resume that you send out?

(Multiple Choice)

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Question 111

A clinic employs nine physicians.Five of the physicians are female.Four patients arrive at once.Assuming the doctors are assigned randomly to patients,what is the probability that all of the assigned physicians are female?

(Multiple Choice)

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Question 112

Ten percent of the corporate managers at Axolotl Industries majored in humanities.What is the probability that the first humanities major is the fifth manager you meet?

(Multiple Choice)

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Question 113

Which model would you use to describe the probability that a call-center operator will make the first sale on the third call,assuming a constant probability of making a sale?

(Multiple Choice)

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Question 114

An insurance company is issuing 16 car insurance policies.Suppose the probability for a claim during a year is 15 percent.If the binomial probability distribution is applicable,then the probability that there will be at least two claims during the year is equal to:

(Multiple Choice)

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Question 115

For which binomial distribution would a Poisson approximation be acceptable?

(Multiple Choice)

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Question 116

A stock portfolio consists of two stocks X and Y.Their daily closing prices are independent random variables with standard deviations σ_X = 2.51 and σ_Y = 5.22.What is the standard deviation of the sum of the closing prices of these two stocks?

(Multiple Choice)

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Question 117

The variance will reach a maximum in a binomial distribution when:

(Multiple Choice)

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Question 118

The binomial distribution is symmetrical when:

(Multiple Choice)

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Question 119

Which distribution has a mean of 5?

(Multiple Choice)

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Question 120

Showing 101 - 120 of 127

In Quebec,90 percent of the population subscribes to the Roman Catholic religion.In a random sample of eight Quebecois,find the probability that the sample contains at least five Roman Catholics.

The binomial distribution describes the number of:

On a particular Thursday in August,40 Grand Canyon tourists enter a drawing for a free mule ride.Ten of the entrants are European tourists.Five entrants are selected at random to get the free mule ride.Which model best describes the number of European tourists in the random sample?

The probability that an Oxnard University student is carrying a backpack is .70.If 10 students are observed at random,what is the probability that fewer than 7 will be carrying backpacks?

Hardluck Harry has a batting average of .200 (i.e. ,a 20 percent chance of a hit each time he's at bat).Scouts for a rival baseball club secretly observe Harry's performance in 12 random times at bat.What is the probability that Harry will get more than 2 hits?

A fair die is rolled.If it comes up 1 or 2 you win $2.If it comes up 3,4,5,or 6 you lose $1.Find the expected winnings.

As a rule of thumb,the binomial distribution can be used to approximate the hypergeometric distribution whenever the population is at least 20 times as large as the sample.

The number of male babies in a sample of 10 randomly chosen babies is a:

The discrete random variable X is the number of students that show up for Professor Smith's office hours on Monday afternoons.The table below shows the probability distribution for X.What is the probability that at least 1 student comes to office hours on any given Monday?

In a randomly chosen week,which probability model would you use to describe the number of accidents at the intersection of two streets?

When you send out a resume,the probability of being called for an interview is .20.What is the probability that the first interview occurs on the fourth resume that you send out?

A clinic employs nine physicians.Five of the physicians are female.Four patients arrive at once.Assuming the doctors are assigned randomly to patients,what is the probability that all of the assigned physicians are female?

Ten percent of the corporate managers at Axolotl Industries majored in humanities.What is the probability that the first humanities major is the fifth manager you meet?

Which model would you use to describe the probability that a call-center operator will make the first sale on the third call,assuming a constant probability of making a sale?

An insurance company is issuing 16 car insurance policies.Suppose the probability for a claim during a year is 15 percent.If the binomial probability distribution is applicable,then the probability that there will be at least two claims during the year is equal to:

For which binomial distribution would a Poisson approximation be acceptable?

A stock portfolio consists of two stocks X and Y.Their daily closing prices are independent random variables with standard deviations σ_X = 2.51 and σ_Y = 5.22.What is the standard deviation of the sum of the closing prices of these two stocks?

The variance will reach a maximum in a binomial distribution when:

The binomial distribution is symmetrical when:

Which distribution has a mean of 5?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters

Exam 6: Discrete Probability Distributions

In Quebec,90 percent of the population subscribes to the Roman Catholic religion.In a random sample of eight Quebecois,find the probability that the sample contains at least five Roman Catholics.

The binomial distribution describes the number of:

On a particular Thursday in August,40 Grand Canyon tourists enter a drawing for a free mule ride.Ten of the entrants are European tourists.Five entrants are selected at random to get the free mule ride.Which model best describes the number of European tourists in the random sample?

The probability that an Oxnard University student is carrying a backpack is .70.If 10 students are observed at random,what is the probability that fewer than 7 will be carrying backpacks?

Hardluck Harry has a batting average of .200 (i.e. ,a 20 percent chance of a hit each time he's at bat).Scouts for a rival baseball club secretly observe Harry's performance in 12 random times at bat.What is the probability that Harry will get more than 2 hits?

A fair die is rolled.If it comes up 1 or 2 you win $2.If it comes up 3,4,5,or 6 you lose $1.Find the expected winnings.

As a rule of thumb,the binomial distribution can be used to approximate the hypergeometric distribution whenever the population is at least 20 times as large as the sample.

The number of male babies in a sample of 10 randomly chosen babies is a:

The discrete random variable X is the number of students that show up for Professor Smith's office hours on Monday afternoons.The table below shows the probability distribution for X.What is the probability that at least 1 student comes to office hours on any given Monday?

In a randomly chosen week,which probability model would you use to describe the number of accidents at the intersection of two streets?

When you send out a resume,the probability of being called for an interview is .20.What is the probability that the first interview occurs on the fourth resume that you send out?

A clinic employs nine physicians.Five of the physicians are female.Four patients arrive at once.Assuming the doctors are assigned randomly to patients,what is the probability that all of the assigned physicians are female?

Ten percent of the corporate managers at Axolotl Industries majored in humanities.What is the probability that the first humanities major is the fifth manager you meet?

Which model would you use to describe the probability that a call-center operator will make the first sale on the third call,assuming a constant probability of making a sale?

An insurance company is issuing 16 car insurance policies.Suppose the probability for a claim during a year is 15 percent.If the binomial probability distribution is applicable,then the probability that there will be at least two claims during the year is equal to:

For which binomial distribution would a Poisson approximation be acceptable?

A stock portfolio consists of two stocks X and Y.Their daily closing prices are independent random variables with standard deviations σX = 2.51 and σY = 5.22.What is the standard deviation of the sum of the closing prices of these two stocks?

The variance will reach a maximum in a binomial distribution when:

The binomial distribution is symmetrical when:

Which distribution has a mean of 5?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters

A stock portfolio consists of two stocks X and Y.Their daily closing prices are independent random variables with standard deviations σ_X = 2.51 and σ_Y = 5.22.What is the standard deviation of the sum of the closing prices of these two stocks?