# ps7 - INTRODUCTION TO STATISTICS(PAM2100-001-LEWIS-FALL2009...

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INTRODUCTION TO STATISTICS (PAM2100-001-LEWIS-FALL2009) > TAKE ASSESSMENT: PS 7 Take Assessment: ps 7 Name ps 7 Instructions Multiple Attempts Not allowed. This Test can only be taken once. Force Completion This Test can be saved and resumed later. Question Completion Status: Question 1 1 points Save Suppose that A and B are two events with P(A) = 0.4, P(B) = 0.3, and P(B|A)=0.2. What is P(A or B)? (Remember to express your answer as a proportion.) Question 2 1 points Save Call a household prosperous if its income exceeds \$150,000. Call the household educated if the householder completed college. Select an American household at random, and let A be the event that the selected household is prosperous and B the event that it is educated. According to a government survey, P( A ) = 0.25 and P( B ) = 0.42, and the probability that a household is both prosperous and educated is P( A and B ) = 0.21. What is the P( A c and B c )? (Remember to express your answer as a proportion.) Question

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ps7 - INTRODUCTION TO STATISTICS(PAM2100-001-LEWIS-FALL2009...

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