Suppose that a class of 30 students is assigned to write an essay. 1)suppose 4 essays are
randomly chosen to appear on the class bulletin board. How many different groups of 4 are
possible? 2.)Suppose 4 essays are randomly chosen for awards of $10, $7, $5, and $3. How
many different groups of 4 are possible? Explain the significant differences between
problems 1 and 2. A: Problem 1 is a combination, not dependent on order, while problem 2
is a permutation and is dependent on order.
The number of oil spills occurring off the Alaskan coast is discrete
The pH level in a shampoo is continuous
Focus groups of 10 people are randomly selected to discuss products of the Famous
Company. It is determined that the mean number (per group) who recognize the Famous
brand name is 4.8, and the standard deviation is .73. Would it be unusual to randomly
select 10 people and find that greater than 8 recognize the Famous brand name? A: yes
because 8>μ+2
σ
Choosing 5 people (without replacement) from a group of 59 people, of which 15 are women,
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 Fall '08
 Sapko
 Statistics, Normal Distribution, Standard Deviation, Probability theory, famous company, AccuData Media Research

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