Probability
Not what you're looking for?
Please see the attached file for full problem description.
---
To determine a target audience for a new email package, a computer company surveyed a large sample of potential customers, asking each whether he or she uses email on a regular basis. (The company considered "a regular basis" to be at least three times a week.) The data, as summarized in the contingency table below, were classified by the age of the respondent and the response to the question.
The respective observed frequencies are written in the cells of the table. In addition, three of the cells have blanks beneath the observed frequencies. Fill in these blanks with the frequencies expected if the two variables, email use and age, are independent.
Round your responses to at least two decimal places.
Under 18 18-35 36-54 55+ Total
On a regular basis 123 109 47 117
(fill this in) 396
Not on a reg. Basis 165 188 51 200
(fill this in) (fillthisin)
Total 288 297 98 317 1000
Purchase this Solution
Solution Summary
The solution answers the question(s) below.
Solution Preview
Probability of two independent events is
P(under 18 and on a regular basis) = P(under 18) x P(on a regular basis)
=288/1000 x 396/1000 ...
Purchase this Solution
Free BrainMass Quizzes
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.