Unit 4b Quizziz Review

Which of the following would be considered discrete random variables?

• The time it takes to run a race

• The number of grains of sand at the beach

• The number of students who like math

• Shoe sizes

• The weights of students at Midlo

Of the two tables below, which can be considered a probability distribution?

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CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

The number of sweatshirts a vendor sells daily has the following probability distribution.

What is the missing value in the distribution?

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CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

The number of sweatshirts a vendor sells daily has the following probability distribution.

What is the probability that the vendor sells 3 sweatshirts at most, on any randomly-selected day?

The number of sweatshirts a vendor sells daily has the following probability distribution.

What is the expected value? Do NOT round your answer.

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CCSS.HSS.MD.A.2

The number of sweatshirts a vendor sells daily has the following probability distribution.

As you saw in the last problem, the expected value is 1.52. What is the meaning of the expected value in the context of the problem?

• Each day, the vendor will sell 1.52 sweatshirts.

• The vendor will sell an average of 1.52 sweatshirts in the long run.

• The vendor should sell at least 1.52 sweatshirts per day.

• Each customer will buy 1.52 sweatshirts.

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CCSS.HSS.MD.A.2

The number of sweatshirts a vendor sells daily has the following probability distribution.

As you saw in the last two problems, the expected value is 1.52. How many sweatshirts should the vendor expect to sell in 100 days?

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CCSS.HSS.MD.A.2

The number of sweatshirts a vendor sells daily has the following probability distribution.

What is the variance? Round to the nearest hundredth.

The number of sweatshirts a vendor sells daily has the following probability distribution.

What is the standard deviation? Round to the nearest hundredth.

An insurance policy costs $200 and will pay policyholders $10,000 if they suffer a major injury (resulting in hospitalization) or $3000 if they suffer a minor injury (resulting in lost time from work). The company estimates that each year 1 in every 5000 policyholders may have a major injury while 1 in 200 have a minor injury.

If X is how much money a customer receives from the company, what is the expected value?

Tags

CCSS.HSS.MD.B.5A