Week 4 Practice Quiz

Week 4 Practice Quiz - Grade Details 1. Question: Your...

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1. Question: How many ways can a committee of 5 be chosen from 25 people? Your Answer: 100 125 6375600 15504 53130 CORREC T Instructor Explanation: use the formula nCr because order doesn't matter Points Received: 4 of 4 2. Question: Which of the following cannot be a probability? Your Answer: 1 85% 4/3 CORREC T Instructor Explanation: 4/3 which = 1.333. ... cannot be a probability because probabilities are always between 0 and 1 inclusive. Points Received: 4 of 4 3. Question: Use this table to answer questions #3 through #6. Some students were asked if they carry a credit card. Here are the responses. Class______ | Credit Card Carrier | Not a Credit Card Carrier | Total Freshman______________33_______________________27________________60 Sophomore______________6_______________________34________________40 Total__________________39_______________________61________________100 What is the probability that the student was a freshman? Your Answer: 60/100 = .6 = 60% Instructor Explanation: P(Freshman) = 60/100 = .600 Points Received: 4 of 4 4. Question: What is the probability that the student is a freshman and doesn't carry a credit card? Your
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This note was uploaded on 12/08/2009 for the course STATS STATS430 taught by Professor Forgot during the Spring '08 term at DeVry Chicago.

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Week 4 Practice Quiz - Grade Details 1. Question: Your...

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