AP Statistics Warm-Up 6.1

The weight of a package you are mailing at the post office.

• Discrete
• Continuous

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CCSS.HSN.Q.A.1

CCSS.HSN.Q.A.3

Discrete or Continuous?

• Discrete
• Continuous

Tags

CCSS.2.MD.D.9

While driving to Florida, Sophia averaged 72 m.p.h. 

• Discrete
• Continuous

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CCSS.HSF-LE.A.1B

The number of orange Skittles in a bag. 

• Discrete
• Continuous

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CCSS.HSF.IF.A.3

A random variable is

• a hypothetical list of the possible outcomes of a random phenomenon.
• any phenomenon in which outcomes are equally likely.
• any number that changes in a predictable way in the long run.
• a variable whose value is a numerical outcome associated with a random phenomenon.

Which of the following random variables is NOT continuous?

• Amount of gasoline in a car.
• Time it takes to commute to work.
• Number of goals scored by a hockey team.
• Lifetime of a AAA battery.

which is true statement about discrete probability distribution?

• The sum of the probabilities must be greater than 1

• The sum of each value of the random variable must be between 1 and 2

• it consists of the values a random variable can assume and the corresponding probabilities of the values

• Random variables can only one value

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

In a particular game, a fair die is tossed.  If the number of spots showing is either 4 or 5 you win $1, if the number of spots showing is 6 you win $4, and if the number of spots showing is 1, 2, or 3 you win nothing.  Let X be the amount that you win. 
Which of the following is the expected value of X?

• $1.00
• $2.50
• $4.00
• $6.00

A small store keeps track of the number X of customers that make a purchase during the first hour that the store is open each day.  Based on the records, X has the following probability distribution.
The mean number of customers that make a purchase during the first hour that the store is open is:
   

• 2.0
• 2.5
• 2.9
• 3

Tags

CCSS.HSS.MD.A.1

CCSS.HSS.MD.A.2

CCSS.HSS.MD.B.5

A small store keeps track of the number X of customers that make a purchase during the first hour that the store is open each day.  Based on the records, X has the following probability distribution.
The standard deviation of the number of customers that make a purchase during the first hour that the store is open is

• 0.2
• 1.4
• 2.0
• 3.0