Essentials of Statistics for the Behavioral Sciences
8th Edition
ISBN: 9781133956570
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
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Textbook Question
Chapter 1.4, Problem 2LC
An English professor uses letter grades (A, B, C, D, and F) to evaluate a set of student essays. What kind of scale is being used to measure the quality of the essays?
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The table below shows the best price available for various items from 4 uniform suppliers. The prices do not include VAT
(charged at 20%).
Item
A1-Uniforms (£)Best Trade (£)Clothing Tech (£)Dress Right (£)
Waterproof boots
59.99
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9.98
9.99
11.99
Shirts
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15.99
16.99
12.99
Hi-Vis vest
4.49
4.50
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4.00
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25.00
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19.99
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A company needs to buy a set of 12 uniforms which includes 1 of each item. If the special offers are included,
which supplier is cheapest?
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Critics review films out of 5 based on three attributes: the story, the special effects and the acting. The ratings of four critics for a film are collected in the table below.CriticSpecialStory rating Effects rating Acting rating
Critic 14.44.34.5Critic 24.14.23.9Critic 33.943.4Critic 44.24.14.2Critic 1 also gave the film a rating for the Director's ability. If the average of Critic 1's ratings was 4.3 what rating did they give to the Director's ability?3.94.04.14.24.3
Two measurements are made of some quantity. For the first measurement, the average
is 74.4528, the RMS error is 6.7441, and the uncertainty of the mean is 0.9264. For the
second one, the average is 76.8415, the standard deviation is 8.3348, and the uncertainty of
the mean is 1.1448. The expected value is exactly 75.
13. Express the first measurement in public notation.
14. Is there a significant difference between the two measurements?
1
15. How does the first measurement compare with the expected value?
16. How does the second measurement compare with the expected value?
Chapter 1 Solutions
Essentials of Statistics for the Behavioral Sciences
Ch. 1.2 - A researcher is interested in the texting habits...Ch. 1.2 - A researcher is interested in how watching a...Ch. 1.2 - Statistical techniques are classified into two...Ch. 1.2 - Briefly define the concept of sampling error.Ch. 1.3 - A research study comparing alcohol use for college...Ch. 1.3 - What two elements are necessary for a research...Ch. 1.3 - Stephens, Atkins, and Kingston (2009) conducted an...Ch. 1.4 - A tax form asks people to identify their annual...Ch. 1.4 - An English professor uses letter grades (A, B, C,...Ch. 1.4 - The teacher in a communications class asks...
Ch. 1.4 - A researcher studies the factors that determine...Ch. 1.4 - a. When measuring height to the nearest inch, what...Ch. 1.5 - Calculate each value requested for the following...Ch. 1.5 - Prob. 2LCCh. 1.5 - Use summation notation to express each of the...Ch. 1 - A researcher is investigating the effectiveness of...Ch. 1 - Define the terms population, sample, parameter,...Ch. 1 - Statistical methods arc classified into two major...Ch. 1 - Define the concept of sampling error and explain...Ch. 1 - Describe the data for a correlation research study...Ch. 1 - What is the goal for an experimental research...Ch. 1 - Knight and Haslam (2010) found that office workers...Ch. 1 - Judge and Cable (2010) found that thin women had...Ch. 1 - Two researchers are both interested in determining...Ch. 1 - Weinstein, McDermott, and Roediger (2010)...Ch. 1 - A research study reports that alcohol consumption...Ch. 1 - Oxytocin is a naturally occurring brain chemical...Ch. 1 - For each of the following, determine whether the...Ch. 1 - Four scales of measurement were introduced in this...Ch. 1 - In an experiment examining the effects Tai Chi on...Ch. 1 - Explain why shyness is a hypothetical construct...Ch. 1 - Ford and Torok (2008) found that motivational...Ch. 1 - For the following scores, find the value of each...Ch. 1 - For the following set of scores, find the value of...Ch. 1 - For the following set of scores, find the value of...Ch. 1 - Two scores, X and Y, are recorded for each of n =...Ch. 1 - Use summation notation to express each of the...Ch. 1 - Prob. 23P
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