Exam 7: A: Random Variables and Discrete Probability Distributions

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Risky Undertaking Suppose you make a $2,000 investment in a risky undertaking.There is a 50% chance that the payoff from the investment will be $5,000,a 20% chance that you will just get your money back,and a 30% chance that you will receive nothing at all from your investment. -{Risky Undertaking Narrative} If you invest $6,000 in the risky undertaking instead of $2,000 and the possible payoffs triple accordingly,what are the expected value of the net profit from the $6,000 investment?

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Question 221

Unsafe Levels of Radioactivity The number of incidents at a nuclear power plant has a Poisson distribution with a mean of 6 incidents per year. -A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it.

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Question 222

Retries The following table contains the probability distribution for X = the number of retries necessary to successfully transmit a 1024K data package through a double satellite media. 0 1 2 3 ( ) 0.35 0.35 0.25 0.05 -The covariance can be negative but the coefficient of correlation cannot.

(True/False)

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Question 223

Unsafe Levels of Radioactivity The number of incidents at a nuclear power plant has a Poisson distribution with a mean of 6 incidents per year. -The number of homeless people in Boston is an example of a discrete random variable.

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Question 224

The variance of a binomial distribution for which n = 100 and p = 0.20 is:

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Question 225

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Unsafe Levels of Radioactivity The number of incidents at a nuclear power plant has a Poisson distribution with a mean of 6 incidents per year. -A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it.

Retries The following table contains the probability distribution for X = the number of retries necessary to successfully transmit a 1024K data package through a double satellite media. 0 1 2 3 ( ) 0.35 0.35 0.25 0.05 -The covariance can be negative but the coefficient of correlation cannot.

Unsafe Levels of Radioactivity The number of incidents at a nuclear power plant has a Poisson distribution with a mean of 6 incidents per year. -The number of homeless people in Boston is an example of a discrete random variable.

The variance of a binomial distribution for which n = 100 and p = 0.20 is:

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

A: Numerical Descriptive Techniques

B: Numerical Descriptive Techniques

C: Numerical Descriptive Techniques

Data Collection and Sampling

Probability

B: Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

A: Simple Linear Regression and Correlation

B: Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analysis and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

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