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STA_Notes_9.12.07

# STA_Notes_9.12.07 - free throws If the 2 throws are...

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STA Class 00:22:56 Questions o An advertising agency knows that 35% of all households subscribe to the weekday paper, 50% get the Sunday paper, and 20% get both. A) Represent this data in a Venn Diagram B) if a household subscribes to the weekday paper what is the probability they also subscribe to the Sunday paper? o There are 2 traffic lights on a route used by a person. Let A = event they have to stop for the 1 st light and let B = event they have to stop for the 2 nd light. Given the following probabilities: P(A) = .4 P(B) = .3 and P(A Intersect B) = .15 Find the probability the person must stop for at least one light Find the probability they don’t have to stop for either light Find the probability they have to stop at only the 1 st light. o 1. Toss a coin 3 times. Let A = at least one head and let B = at most one tail. Find P(A) and P(B). 2. Find the probability a couple having 3 children will have exactly 2 boys. o 1. Suppose a basketball player that makes 80% of his foul shots has been awarded 2

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Unformatted text preview: free throws. If the 2 throws are considered independent what is the probability the player makes both shots? Exactly one? Neither shot? o 1. A survey of 140 students was classified into the following table: Freshmen Sophomore Junior Senior Male 10 15 20 5 Female 30 10 38 12 Randomly select a student and let A = {male}, B = {freshman} and C = {jr or sr} P(AUB) = P(A Intersect B) = P(A/B) = P(B/A)= P(B/C)= o Ten people are in the final interview stage for 2 open positions at a company. There are 6 males and 4 females equally qualified. Let A = {male picked for job #1} and B = {male picked for job #2} Probability the 2 jobs are given to males? Probability the 2 jobs are given to females? Probability a female gts the 1 st job and a male gets the 2 nd ? STA Class 00:22:56 Probability a male gtes the 1 st job and a female gets the 2 nd ? o...
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STA_Notes_9.12.07 - free throws If the 2 throws are...

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