CCSS.Math.Content.HSS.MD.A.2

If the expected value is negative, are you expected to win?

• yes
• no

Tags

CCSS.Math.Content.HSS.MD.A.2

If the expected value is positive, are you expected to win?

• yes
• no

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CCSS.Math.Content.HSS.MD.A.2

The mean and standard deviation of a population are 400 and 40, respectively. Sample size is 25. 
What is the mean of the sampling distribution?

• 400
• 40
• 25
• 8

Tags

CCSS.Math.Content.HSS.MD.A.2

Find the expected value. READ CAREFULLY!

• 4.5
• 25.5
• 3.825
• 6.52

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CCSS.Math.Content.HSS.MD.A.2

The Floppy Disk Company makes 3.5 inch floppy disks (mean) for disk drives that are 3.7 inches wide. The size of a manufactures disk is normally distributed with a standard deviation of 0.1 inches. The company manufactures 1000 disks every hour. In one hour, how many disks would you expect to be between 3.4 inches and 3.7 inches?

• 34

• 135

• 68

• 815

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CCSS.Math.Content.HSS.MD.A.2

CCSS.Math.Content.HSS.ID.A.4

The table shows the frequency of the number of visits to the doctor per year for a group of children. What is the mean?

• 2

• 2.2

• 3

• 7.5

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CCSS.Math.Content.HSS.MD.A.2

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the mean and the standard deviation.

• μ = .4; σ = 7.5

• μ = 2.5; σ = 1.1

• μ = 3; σ = 1.3

• μ = .1; σ = 0

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CCSS.Math.Content.HSS.MD.A.2

The mean and standard deviation of a population are 400 and 40, respectively. Sample size is 25. 
What is the mean of the sampling distribution?

• 400
• 40
• 25
• 8

Tags

CCSS.Math.Content.HSS.MD.A.2

Eva flips a coin. If she gets heads, she wins $4. If she gets tails, she loses $3. What is her expected value of a coin flip?

• $1

• $0.50

• -$0.50

• $0

Tags

CCSS.Math.Content.HSS.MD.A.2

A student group sells 500 raffle tickets for $2 each. At the drawing the top prize will be a gift certificate for $100. Second prize will be a $50 gift card and there will be five 3rd prizes, each a $20 gift card. Do you expect to win or lose (on average)? How much?

• lose an average of $5.50

• lose an average of $1.50

• win an average of $2.00

• lose an average of $10.00

Tags

CCSS.Math.Content.HSS.MD.A.2