Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 1 - Section 1.4 - Assess Your Understanding - Vocabulary and Skill Building: 1

Answer

Parents take their children to the movies to watch a children's movie. After the end of the movie, a survey is conducted to determine whether the audience liked or not. Three different questionnaires are prepared for three diffrent groups: children under 14 years old, adolescents of 14 to 21 years of age, and adults that are over 22 years old. A simple random sample is obtained from each group (strata).

Work Step by Step

The individuals of each group are homogeneous: it is expected that they have a similar opinion about the movie. So, a smaller number of respondents is required.
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