A Particular Paperback Mystery Book Is Published with a Choice

question 52

Multiple Choice

A particular paperback mystery book is published with a choice of three different pictures on the cover: a photograph of the actor playing the main character in the movie version of the book,a drawing of the mansion where the story takes place,or an embossed graphic of the murder weapon.A certain bookstore keeps copies of this book with each of the pictures on the cover on its racks.To test the hypothesis that sales of this book are equally divided among the three choices,a simple random sample of 120 purchases of this book is obtained.The numbers are displayed in the table below. Under the null hypothesis that sales are equally divided among the three different covers,what is the value of the expected count for sales of the book with the photograph of the actor on the cover?

• A)0.258
• B)0.333
• C)31
• D)40

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Definitions:

Basic Concept

Fundamental ideas that underpin a subject or field of study, serving as the foundation for further knowledge and understanding.

Mental Set

A psychological tendency to approach situations in a certain way because that method has worked in the past, which can limit problem-solving abilities.

Homo Sapiens

The scientific name for the human species, characterized by a high level of intelligence, complex language, and the ability to create and manipulate the environment.

Rational Man

A concept in economics and philosophy that assumes an individual acts logically and with complete information, aiming to maximize personal benefit.