IT OUT!

Directions: Students get into pairs, decide A and B Each pair gets a whiteboard and 2 markers For each question,one part of the partner writes the answer on the whiteboard solo. When finished, the other partner CHECKS the work When pair agrees, hold up the board. One point per correct answer

Question 1- Partner A Write down the sample space for flipping two coins. Answer: HH, HT, TH, TT

Question 2- Partner B Write down the sample space for rolling a die. Answer: 1, 2, 3, 4, 5, 6

3(A):A spinner has 4 equal parts: Red, Purple, Green and Yellow 3(A):A spinner has 4 equal parts: Red, Purple, Green and Yellow. If the spinner is spun twice, what is the probability of getting red both times? A) 1/16 B) 1/8 C) 1/4 D) 1/2 E) 2/3 Answer: A

B) 1/8 C) 1/4 D) 1/2 E) None of the above 4(B): A spinner has 4 equal parts: Red, Purple, Green and Yellow. If the spinner is spun twice, what is the probability of getting the same color both times? A) 1/16 B) 1/8 C) 1/4 D) 1/2 E) None of the above Answer: C

5(A):In a class, students can earn an A, B, C, D or F. If the P(A) = 0 5(A):In a class, students can earn an A, B, C, D or F. If the P(A) = 0.2, P(B) = P(C) = 0.3, what is the probability of earning a D if P(D) = P(F)? A) 0 B) 0.06 C) 0.1 D) 0.5 E) Cannot be determined Answer: C

6(B): The chances of being ticketed for illegal parking on any given day is 1/3. During the last nine days, you have parked illegally, but have not been ticketed. Today, on the 10th day, you park illegally again. The chances you get caught are… A) greater than 1/3 because you have not been ticketed yet B) less than 1/3 since you haven’t been caught yet C) equal to 1/3 because the days are independent D) equal to 1/10 since you haven’t been caught in 9 days E) equal to 9/10 since you haven’t been caught in 9 days Source: http://www.stat.sfu.ca/~cschwarz/MultipleChoice/prob.general.pdf Answer: C

7(A): What is the probability of getting exactly 1 head when flipping a coin three times? Answer: NO. Since P(A or B) = P(A) + P(B) – (A and B), P(A and B) has to be > 0.

B) 13/52 C) 4/13 D) 17/52 E) None of the above 8(B): A card is drawn randomly from a standard deck of playing cards. You win if you choose an ace or a spade. What is the probability that you lose? A) 1/13 B) 13/52 C) 4/13 D) 17/52 E) None of the above Source: http://stattrek.com/AP-Statistics-4/AP-Statistics-Practice-Exam-1.aspx?Tutorial=ap Answer:

9(A): What does it mean for two events to be independent? Answer:

10(B): What does it mean when two events are disjoint? Answer:

Question 11(A) At the local high school, students have a choice of taking Spanish (S), German (G) or French (F) as their foreign language. P(S) =0.4, P(S and G) = 0.04, P(F) = 0.3, P(S and F) = 0.05, P(G) = 0.35, P(G and F) = 0.02, P(S and G and F) = 0.01 Draw a Venn diagram to illustrate this situation

Question 12(B) The probability that a randomly selected San Diegan went out to dinner last weekend is 0.4. If a San Diegan went out to dinner, the probability that they went to bed after 10:00pm is 0.82. If a San Diegan did not go out to dinner, the probability they went to be after 10:00pm is 0.54. Draw a tree diagram to represent this situation.

References College Board. (2009). Retrieved on November 14, 2009 from http://apcentral.collegeboard.com/apc/members/exam/exam_questions/8357.html Schwartz, Karl. (2006). Retrieved on November 13, 2009 from http://www.stat.sfu.ca/~cschwarz/MultipleChoice/prob.general.pdf Stat Trek. (2009). Retrieved on November 13, 2008 from http://stattrek.com/AP-Statistics-4/AP-Statistics-Practice-Exam-1.aspx?Tutorial=ap