Statistics for Psychology
6th Edition
ISBN: 9780205258154
Author: Arthur Aron Ph.D., Elaine N. Aron Ph.D., Elliot Coups Ph.D., Cole Publishing
Publisher: PEARSON
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Chapter 1, Problem 3.4HD
To determine
Differentiate between a histogram based on a nominal variable from that based on a numeric equal-interval variable.
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During busy political seasons, many opinion polls are conducted. In apresidential race, how do you think the participants in polls are generally selected?Discuss any issues regarding simple random, stratified, systematic, cluster, andconvenience sampling in these polls. What about other types of polls, besides political?
Please could you explain why 0.5 was added to each upper limpit of the intervals.Thanks
28. (a) Under what conditions do we say that two random variables X and Y are
independent?
(b) Demonstrate that if X and Y are independent, then it follows that E(XY) =
E(X)E(Y);
(e) Show by a counter example that the converse of (ii) is not necessarily true.
Chapter 1 Solutions
Statistics for Psychology
Ch. 1 - A father rates his daughter as a 2 on a 7-point...Ch. 1 - What is the difference between a numeric and a...Ch. 1 - Give the level of measurement of each of the...Ch. 1 - What is the difference between a discrete and a...Ch. 1 - What is a frequency table?
Ch. 1 - Why would a researcher want to make a frequency...Ch. 1 - Make a frequency table for the following scores:...Ch. 1 -
What does a grouped frequency table group?
Ch. 1 -
Why do researchers make histograms?
Ch. 1 - When making a histogram from a frequency table,...
Ch. 1 - Make a histogram based on the following frequency...Ch. 1 - How is a histogram based on a nominal variable...Ch. 1 - Describe the difference between a unimodal and...Ch. 1 - What does it mean to say that a distribution is...Ch. 1 - What kind of skew is created by (a) a floor effect...Ch. 1 - When a distribution is described as being peaked...Ch. 1 - A client rates her satisfaction with her...Ch. 1 - Give the level of measurement for each of the...Ch. 1 - A particular block in a suburban neighborhood has...Ch. 1 - Fifty students were asked how many hours they...Ch. 1 - These are the scores on a test of sensitivity to...Ch. 1 - The following data are the number of minutes it...Ch. 1 - Describe the shapes of the three distributions...Ch. 1 - Make up and draw an example of each of the...Ch. 1 - Explain to a person who has never had a course in...Ch. 1 - McKee and Ptacek (2001) asked 90 college students...Ch. 1 - A participant in a cognitive psychology study is...Ch. 1 - Explain and give an example for each of the...Ch. 1 - An organizational psychologist asks 20 employees...Ch. 1 - A social psychologist asked 15 college students...Ch. 1 - Following are the speeds of 40 cars clocked by...Ch. 1 - Here are the number of holiday gifts purchased by...Ch. 1 - Explain to a person who has never taken a course...Ch. 1 - Make up and draw an example of each of the...Ch. 1 - Raskauskas and Stoltz (2007) asked a group of 84...Ch. 1 - Mouradian (2001) surveyed college students...
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- 19. Let X be a non-negative random variable. Show that lim nE (IX >n)) = 0. E lim (x)-0. = >arrow_forward(c) Utilize Fubini's Theorem to demonstrate that E(X)= = (1- F(x))dx.arrow_forward(c) Describe the positive and negative parts of a random variable. How is the integral defined for a general random variable using these components?arrow_forward
- 26. (a) Provide an example where X, X but E(X,) does not converge to E(X).arrow_forward(b) Demonstrate that if X and Y are independent, then it follows that E(XY) E(X)E(Y);arrow_forward(d) Under what conditions do we say that a random variable X is integrable, specifically when (i) X is a non-negative random variable and (ii) when X is a general random variable?arrow_forward
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