Statistics for The Behavioral Sciences (MindTap Course List)

10th Edition

ISBN: 9781305504912

Author: Frederick J Gravetter, Larry B. Wallnau

Publisher: Cengage Learning

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear re…

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Textbook Question

Chapter 6, Problem 25P

The student health clinic reports that only 30%, of students got a flu shot this year. If a researcher surveys

a sample of n = 84 students attending a basketball

game,

a. What is the probability that any individual student has had a flu shot?

b, What is the probability that more than 30 students have had flu shots ?

c. What is the probability that 20 or fewer students

have had sshots?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 6 Solutions

Statistics for The Behavioral Sciences (MindTap Course List)

Ch. 6 - What are the two requirements for a random sample?Ch. 6 - Define sampling with replacement and explain why...Ch. 6 - Around Halloween each year the grocery store sells...Ch. 6 - A psychology class consists of 28 males and 52...Ch. 6 - 5. Draw a vertical line through a normal...Ch. 6 - Draw a vertical line through a normal distribution...Ch. 6 - Find each of the following probabilities for a...Ch. 6 - S. What proportion of a normal distribution is...Ch. 6 - Find each of the following probabilities for a...Ch. 6 - 10. Find the z-score location of a vertical line...

Ch. 6 - Find the z-score boundaries that separate a normal...Ch. 6 - A normal distribution has a mean of =70 and a...Ch. 6 - 13. A normal distribution has a mean .of µ=30 and...Ch. 6 - For a normal distribution with a mean of =60and a...Ch. 6 - 15. In 20l4, the New York Yankees had a team...Ch. 6 - 16. IQ test scores are standardized to produce a...Ch. 6 - The distribution of scores on the SAT is...Ch. 6 - 18. According to a recent report, people .smile an...Ch. 6 - A report in 20 l0 indicates that Americans between...Ch. 6 - , Rochester, New York, averages µ = 2 l .9 inches...Ch. 6 - A multiple-choice test has 32 questions, ,each...Ch. 6 - A true/false test has 20 questions. If a student...Ch. 6 - A roulette wheel has alternating red and black...Ch. 6 - A test developed to measure ESP involves using...Ch. 6 - The student health clinic reports that only 30%,...

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A manufacturer has determined that a machine averages one faulty unit for every 500 it produces. What is the probability that an order of 300 units will have one or more faulty units?

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Solution Summary: The author calculates the probability that any individual student has had a flu shot is 0.3, and that more than 30 students have had flu shots is 0.1038.

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Chapter 6 Solutions