STAT 1124 Quiz 4 Model Answers

# STAT 1124 Quiz 4 Model Answers - STAT 1124 Section 2 Quiz 4...

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STAT 1124 Section 2 Name: Quiz 4 Student ID: March 17, 2009 You have 20 minutes to complete the following: 1. Choose a young adult (age 18 to 24) at random. The probability is 0.15 that the person did not complete high school, 0.35 that the person has a high school diploma but no further education, and 0.27 that the person has at least a bachelor's degree. a. What is the probability that a randomly chosen young adult has some education beyond high school but does not have a bachelor's degree. ( 1 Point ) 1 - (0.15+0.35+0.27) = 0.23 b. What is the probability that a randomly chosen young adult has at least a high school education? ( 1 Point ) 1 - 0.15 = 0.85 2. A random sample of 400 students from various universities and colleges in BC were selected in a research study on whether they are provided with on-campus residence. Results of this study are as follows: Where they study Residence Provided? At a College At an University Total Yes 40 150 190 No 100 110 210 Total 140 260 400 Find the following probabilities ( in fractions ) (4): a. P(Residence Provided) ( 1 Point )

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