Statistics for the Behavioral Sciences, Loose-leaf Version
Statistics for the Behavioral Sciences, Loose-leaf Version
10th Edition
ISBN: 9781305862807
Author: GRAVETTER
Publisher: CENGAGE L
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Estimation
A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.
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Chapter 6, Problem 19P

  1. A report in 20 l0 indicates that Americans between the ages of 8 and 18 spend an average of µ=7.5 hours
    2. per day using some sort of electronic device such as smart phones, computers, or tablets. Assume that: the distribution of times is normal with a standard deviation of σ = 2.5 hours and find the following values.

  • What is the probability of electing an individual who
    • uses electronic devices more than 12 hours a day?

  • What proportion of 8 to 18 year- old Americans
    • spend between 5 and l0 hours per day using electronic devices? In symbols, p(5 < X < 10) =?

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    Chapter 6 Solutions

    Statistics for the Behavioral Sciences, Loose-leaf Version

    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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