AP Stats

You want to see if students who have a 4.0 grade point average study more than those who do not.

• survey

• observational study

• experiment

Which of the following is not a way to choose a random sample of 25?

• Assign numbers. Use a random number generator to choose 25

• Put names in a hat, mix them up and choose 25

• Assemble possible participants in a circle around a person who is blindfolded,  spin the person around 3 times and have them point at a person.  Do this 25 times.

What is the probability that a female is chose given they like a Toyota? 

• .525

• .4627

• .6774

• .3143

Find P( Female | Part-time) =

• 15/31

• 43/71

• 31/43

• 15/43

If A and B are mutually exclusive, which statement below must be true?

• P(A∩B) = 0

• P(A|B) = 0

• P(A∪B) = 0

• P(A) + P(B) = 1

In an AP Statistics class, 57% of students eat breakfast in the morning, 80% of them floss their teeth, and 46% of the students do both.  What is the probability that a randomly chosen student eats breakfast or flosses their teeth?

• 91%

• 9%

• 11%

• 34%

What is the probability that a randomly selected student plays sports given that they do not do community service?

What is the probability that a student plays sports given that they do community service?

What is the probability that the person picked will be a boy given they speak german? 

• .7273

• .4

• .16

• .22

P(Shorts and Shoes):

• 1/6

• 6/16

• 22/16

• 6/22