Graphing Probability Distributions

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.
• No, all probabilities are not be between 0 and 1 inclusive
• No, the sum of all the probabilities is not 1.
• Yes, because the distribution is symmetric

On any given day, there is an 85% chance your friend Jerry will want to hang out. What is the probability distribution graph for X, the number of times Jerry will want to hang out over a 3-day weekend?

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Which of the following is NOT true about probability distribution graphs? Select all that apply.

• They are Bar Charts

• They are Pie Charts

• Probabilities must be between 0 and 1 (inclusive)

• The sum of all probabilities must be less than 1

• Possible values of the discrete random variable are graphed on the x axis

You sacrifice 10 points in your fantasy hockey league to get a particular player. By your calculations, with this player you have a 30% chance of gaining 20 points, a 10% chance of gaining 25 points, and otherwise would gain 0 points. What is the probability distribution graph for X, the net gain of the points this player will provide?

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The following table represents the probability distribution X, the employment status of adults in a city. What is the probability that the adults isn't retired?

Sheila spends $20 on supplies for her lemonade stand. When selling the lemonade, she will make $50 on a sunny day, $25 on a cloudy day, and $5 on a rainy day. The forecast says there is a 60% of a sunny day, a 25% chance of a cloudy day, and a 15% chance of a rainy day. What is the probability distribution graph for Sheila’s net gain?

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Using the probability distribution, find P(X > 1).

The probability distribution for the random variable x is shown in the table

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• Discrete

• Continuous

• Abstract

• cannot be answered