Statistics For The Behavioral And Social Sciences: A Brief Course, Books A La Carte (6th Edition) (what's New In Psychology)
6th Edition
ISBN: 9780205989065
Author: Arthur Aron Ph.D., Elliot J. Coups Ph.d., Elaine N. Aron Ph.D.
Publisher: PEARSON
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Chapter 3, Problem 24PP
a.
To determine
Explain the procedure to select the people to survey.
b.
To determine
Explain the reason that this method is best.
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A normal distribution has a mean of 50 and a standard deviation of 4. Solve the following three parts?
1. Compute the probability of a value between 44.0 and 55.0.
(The question requires finding probability value between 44 and 55. Solve it in 3 steps.
In the first step, use the above formula and x = 44, calculate probability value.
In the second step repeat the first step with the only difference that x=55.
In the third step, subtract the answer of the first part from the answer of the second part.)
2. Compute the probability of a value greater than 55.0.
Use the same formula, x=55 and subtract the answer from 1.
3. Compute the probability of a value between 52.0 and 55.0.
(The question requires finding probability value between 52 and 55. Solve it in 3 steps.
In the first step, use the above formula and x = 52, calculate probability value.
In the second step repeat the first step with the only difference that x=55.
In the third step, subtract the answer of the first part from the…
If a uniform distribution is defined over the interval from 6 to 10, then answer the followings:
What is the mean of this uniform distribution?
Show that the probability of any value between 6 and 10 is equal to 1.0
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Find the probability of a value between 7 and 9.
The closing price of Schnur Sporting Goods Inc. common stock is uniformly distributed between $20 and $30 per share. What is the probability that the stock price will be:
More than $27?
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The April rainfall in Flagstaff, Arizona, follows a uniform distribution between 0.5 and 3.00 inches.
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The best way to solve this problem is begin by a step by step creating a chart. Clearly mark the range, identifying the…
Client
1
Weight before
diet (pounds)
Weight after
diet (pounds)
128
120
2
131
123
3
140
141
4
178
170
5
121
118
6
136
136
7
118
121
8
136
127
Chapter 3 Solutions
Statistics For The Behavioral And Social Sciences: A Brief Course, Books A La Carte (6th Edition) (what's New In Psychology)
Ch. 3 - Prob. 1.1HDCh. 3 - Write the formula for changing a raw score to a Z...Ch. 3 - For a particular group of scores, M = 20 and SD =...Ch. 3 - Write the formula for changing a Z score to a raw...Ch. 3 - For a particular group of scores, M = 10 and SD =...Ch. 3 - Suppose a person has a Z score for overall health...Ch. 3 - Why is the normal curve (or at least a curve that...Ch. 3 - Without using a normal curve table, about what...Ch. 3 - Without using a normal curve table, about what...Ch. 3 - Without using a normal curve table, about what Z...
Ch. 3 - Using the normal curve table, what percentage of...Ch. 3 - Using the normal curve table, what Z score would...Ch. 3 - Explain the difference between the population and...Ch. 3 - Why do psychologists usually study samples and not...Ch. 3 - Explain the difference between random sampling and...Ch. 3 - Explain the difference between a population...Ch. 3 - Give the symbols for the population parameters for...Ch. 3 - Why are different symbols (Greek versus Roman...Ch. 3 - The probability of an event is defined as the...Ch. 3 - List and explain two interpretations of...Ch. 3 - Suppose you have 400 coins in a jar and 40 of them...Ch. 3 - Prob. 4.4HDCh. 3 - Prob. 4.5HDCh. 3 - On a measure of anxiety, the mean is 79 and the...Ch. 3 - On an intelligence test, the mean number of raw...Ch. 3 - Six months after a divorce, the former wife and...Ch. 3 - Suppose the people living in a city have a mean...Ch. 3 - Using the information in problem 4 and the...Ch. 3 - A psychologist has been studying eye fatigue using...Ch. 3 - In the previous problem, the test of eye fatigue...Ch. 3 - In the eye fatigue example of problems 6 and 7,...Ch. 3 - Using a normal curve table, give the percentage of...Ch. 3 - Consider a test of coordination that has a normal...Ch. 3 - Prob. 11PPCh. 3 - Prob. 12PPCh. 3 - On a measure of artistic ability, the mean for...Ch. 3 - Prob. 14PPCh. 3 - A person scores 81 on a test of verbal ability and...Ch. 3 - Prob. 16PPCh. 3 - Using the information in problem 16 and the...Ch. 3 - Suppose that the scores of architects on a...Ch. 3 - Prob. 19PPCh. 3 - Prob. 20PPCh. 3 - Suppose that you are designing an instrument panel...Ch. 3 - Prob. 22PPCh. 3 - Prob. 23PPCh. 3 - Prob. 24PPCh. 3 - Prob. 25PPCh. 3 - Prob. 26PP
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- Client 1 Weight before diet (pounds) Weight after diet (pounds) 128 120 2 131 123 3 140 141 4 178 170 5 121 118 6 136 136 7 118 121 8 136 127 a) Determine the mean change in patient weight from before to after the diet (after – before). What is the 95% confidence interval of this mean difference?arrow_forwardIn order to find probability, you can use this formula in Microsoft Excel: The best way to understand and solve these problems is by first drawing a bell curve and marking key points such as x, the mean, and the areas of interest. Once marked on the bell curve, figure out what calculations are needed to find the area of interest. =NORM.DIST(x, Mean, Standard Dev., TRUE). When the question mentions “greater than” you may have to subtract your answer from 1. When the question mentions “between (two values)”, you need to do separate calculation for both values and then subtract their results to get the answer. 1. Compute the probability of a value between 44.0 and 55.0. (The question requires finding probability value between 44 and 55. Solve it in 3 steps. In the first step, use the above formula and x = 44, calculate probability value. In the second step repeat the first step with the only difference that x=55. In the third step, subtract the answer of the first part from the…arrow_forwardIf a uniform distribution is defined over the interval from 6 to 10, then answer the followings: What is the mean of this uniform distribution? Show that the probability of any value between 6 and 10 is equal to 1.0 Find the probability of a value more than 7. Find the probability of a value between 7 and 9. The closing price of Schnur Sporting Goods Inc. common stock is uniformly distributed between $20 and $30 per share. What is the probability that the stock price will be: More than $27? Less than or equal to $24? The April rainfall in Flagstaff, Arizona, follows a uniform distribution between 0.5 and 3.00 inches. What is the mean amount of rainfall for the month? What is the probability of less than an inch of rain for the month? What is the probability of exactly 1.00 inch of rain? What is the probability of more than 1.50 inches of rain for the month? The best way to solve this problem is begin by creating a chart. Clearly mark the range, identifying the lower and upper…arrow_forward
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