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Quiz 3 Solutions

# Quiz 3 Solutions - BA 240 W Li Answer Sheet QUIZ 3 Show...

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BA 240 W. Li Answer Sheet QUIZ 3 Show your work clearly and completely. Problem 1 : In a survey of 100 workers in ABC Inc., 70% are Male (MALE) and 10% hold MBA degrees (MBA). In addition, among those who have MBA degrees, 60% of them are Male. Construct a two-way contingency table (use the pairs of events MALE and FEMALE, MBA and NO MBA), and use it to answer the following questions. Keep answers in Fractions (DO NOT SIMPLIFY) for Problem 1a) to 1e) (1 point each) MALE FEMALE TOTAL MBA 6 4 10 NO MBA 64 26 90 TOTAL 70 30 100 Note 1: Calculate the actual values; do NOT write percentage or probability. Note 2: Include TOTAL Row and TOTAL Column. a) Find the probability of a chosen worker, who is a MALE and also holds a MBA degree.. “both…and…” means INTERSECTION “∩” 100 6 ) ( MBA MALE P b) Find the probability of a chosen worker, who is a MALE and also does not hold a MBA degree. “both…and…” means INTERSECTION “∩” 100 64 ) ( NOMBA MALE P c) Find the probability of a chosen worker, who is a FEMALE and holds a MBA degree.

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