A Coin Is Tossed 20 Times

question 36

Multiple Choice

A coin is tossed 20 times. A person who claims to have extrasensory perception is asked to predict the outcome of each flip in advance. She predicts correctly on 14 tosses. What is the probability of being correct 14 or more times by guessing? Does this probability seem to
Verify her claim? Use the normal distribution to approximate the desired probability.

• A) 0.4418, no
• B) 0.4418, yes
• C) 0.0582, no
• D) 0.0582, yes

Understand the advantages and limitations of different research methods including experimental, correlational, and observational studies.

Learn the importance of random sampling and how it differs from random assignment.

Comprehend the steps involved in the scientific process and the relevance of skepticism.

Understand how personal biases or expectations (like experimenter expectancy effects and the placebo effect) can influence research outcomes.

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Definitions:

Assignment Statement

A programming instruction that assigns a value to a variable.

Initialization Statements

Initial setup commands in a program that set variables to their default values.

Reserved Words

Keywords in a programming language that are used by the language itself and cannot be used as identifiers by programmers.

Identifiers

Identifiers are names given to elements in a program, such as variables, functions, and arrays, used for identification purposes.