PSY 315 Week 2 Practice Problems Worksheet
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Resource:Statisticsfor Psychology
Complete the Week Two Practice Problems Worksheet.
Click the Assignment Files tab to submit your assignment.
Note. Computation methods may include the use of Microsoft^{®} Excel^{®}, SPSS^{™}, Lotus^{®}, SAS^{®}, Minitab^{®}, or byhand computation.
Chapter 2
12. For the following scores, find the mean, median, sum of squared deviations, variance, and standard deviation:
1,112; 1,245; 1,361; 1,372; 1,472
16. A psychologist interested in political behavior measured the square footage of the desks in the official office for four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The figures for the CEOs were 32, 60, 48, 36 square feet.
 Figure the means and standard deviations for the governors and CEOs.
 Explain, to a person who has never had a course in statistics, what you have done.
 Note the waus in which the means and standard deviations differ, and speculate on the possible meaning of these differences, presuming that they are representative of U.S. governors and large corporations’ CEOs in general.
21. Radel and colleagues (2011) conducted a study of how feeling overly controlled makes you desire—even unconsciously—more freedom. In their study, 52 Canadian undergraduates played a video game in a laboratory and were randomly assigned to either:
a. anautomony deprivation condition, in which they were told to follow instructions precisely, constantly given instructions over a loudspeaker, and carefully observed on everything they did.
b. a neutral condition, which was much more laid back.
After this activity, they were asked to do a “lexical decision task” (a standard approach for measuring unconscious responses) in which they were shown a series of words and nonwords in random order and had to press “C” if it was a real word or “N” if not. Half of the real words were related to autonomy (e.g., freedom, choice) and half were neutral (e.g., whisper, hammer). The key focus of the study was on how long it took people to press the button *(“response latency”) for each kind of real word, averaged over the many words of each type. The table below shows the mean and standard deviation across the participants of these four categories of results. Thus, for example, 782 milliseconds (thousandths of a second) is the average time it took participants in the autonomydeprived condition to respond to the autonomyrelated words, and 211 is the standard deviation across the 26 participants’ average response time in that condition. Explain the numbers in this table to a person who has never had a course in statistics. (Be sure to explain some specific numbers, as well as the general principle of the mean and standard deviation.) For your interest, the pattern of results shown here supported the researchers’ hypothesis: “Relative to a neutral instructional climate, a controlling climate thwarting the need for autonomy…enhanced accessibility for autonomyrelated words.” (p.924).
Chapter 3
14. On a standard measure of hearing ability, the mean is 300 and the standard deviation is 20. Give the raw scores for persons whose Z scores for persons who score 340, 310, and 260. Give the raw scores for persons whose Z scores on this test are 2.4, 1.5, and 4.5.
16. The amount of time it takes to recover physiologically from a certain kind of sudden noise is found to be normally distributed with a mean of 80 seconds and a standard deviation of 10 seconds. Using the 50%–34%–14% figures, approximately what percentage of scores (on time to recover) will be:
Above 100?
Below 100?
Above 90?
Below 90?
Above 80?
Below 80?
Above 70?
Below 70?
Above 60?
Below 60?
18. Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Z scores:
Above .10?
Below .10?
Above .20?
Below .20?
Above 1.10?
Below 1.10?
Above .10?
Below .10?
21. Suppose that you are designing an instrument panel for a large industrial machine. The machine requires the person using it to reach 2 feet from a particular position. The reach from this position for adult women is known to have a mean of 2.8 feet with a standard deviation of .5. The reach for adult men is known to have a mean of 3.1 feet with a standard deviation of .6. Both women’s and men’s reach from this position is normally distributed. If this design is implemented:
What percentage of women will not be able to work on this instrument panel?
What percentage of men will not be able to work on this instrument panel?
Explain your answers to a person who has never had a course in statistics.
24. Suppose that you were going to conduct a survey of visitors to your campus. You want the survey to be as representative as possible.
How would you select the people to survey?
Why would that be your best method?
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If anxiety and depression are correlated, what three possible directions of causality might explain this correlation?
..

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What is a correlation? What are the different types of correlation research? Why is it important to determine correlation? How is the strength of a correlation determined?
..

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1. Learning Team Assignment: Hypothesis Testing Paper
Resources: Assigned readings, ERRs, the Internet, and other sources
Select a research issue, problem, or opportunity in the field of psychology.
Obtain instructor appro..

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What is the theory underlying the ANOVA? Why is it important? What are the differences between a two sample ttest and ANOVA hypothesis testing? What is an example of a research idea that would need to be analyzed using an ANOVA?
..

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What is a tTest? How is the tTest different from what we learned last week? What is the normal distribution and how does it relate to the ttest? What is an example of a situation in which you would use a t Test for dependent means?
..

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What is the difference between null and alternative hypotheses statements in onetailed and twotailed tests? What are significance/alpha levels and how does using a one versus a two tailed test affect significance levels?
..

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What are some terms related to hypothesis testing with which you are already familiar? What are the five steps of hypothesis testing? Why do the null and alternative hypotheses have to be mutually exclusive?
..

PSY 315 Week 2 Learning team assignment Descriptive and Inferential Statistics Paper andTeam Charter
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1. Learning Team Assignment:Descriptive and Inferential Statistics Paper & Team Charter: see Rubric in the Course MaterialsForum, Also post the team charter to the Assignments section with the completed assignment.
Resources: Assigned readings, ERR..

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How effective are the pie charts that often accompany a newspaper article in explaining the statistics being used in the article? Can you find an example of a pie chart?
..

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The median home price in your area has increased in the last 10 years, how does this differ from the mean home price in your area? How does this illustrate what the mean and median are?
..

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1. Individual Assignment: Research, Statistics, and Psychology Paper
Resources: Assigned readings, ERRs, the Internet, and other sources
Prepare a 700 to 1,050word paper in which you examine the role of research and statistics in the field of psychology.
..

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What are descriptive statistics, and how might you use descriptive statistics in your personal life?
..

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What are the differences between quantitative and qualitative data? What are some examples of each?
..

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Provide a response to the following questions.
Note: Each team member should compute the following questions and submit them to the Learning Team forum. The team should then discuss each team member’s answers to ascertain the correct answer for each question. Once your team has ans..

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Resource: Instructor approved research issue, problem, or opportunity in the field of psychology
Prepare a 1,400 to 1,750word paper in which you formulate a hypothesis based on your selected research issue, problem, or opportunity.
Address the following:
Describe your selected r..

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Chapter 7
The table below shows ratings of various aspects of work and home life of 100 middleclass men in India who were fathers. Pick three rows of interest to you and explain the results to someone who is familiar with the mean, variance, and Z scores, but knows nothing els..

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Prepare a 7 to 10slide Microsoft PowerPoint Presentation with speaker notes, as a lesson to explain the null and alternative hypothesis and how to use a ztest to test the null hypothesis.
Provide an example to illustrate your lesson.
Include a minimum of 12 peer..

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Resource:Statistics for Psychology
Complete the Week Three Practice Problems Worksheet.
Click the assignment files tab to submit your assignment.
Note. Methods of computation may include the usage of Microsoft® Excel®, SPSS™, Lotus®, SAS®, Minitab®, or byh..

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Resource: Assigned journal article
Create a 7 to 10slide presentation with speaker notes examining the differences between descriptive and inferential statistics used in the journal article you were assigned.
Address the following items as they apply to the article:
Describe the..

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Resource:Statisticsfor Psychology
Complete the Week Two Practice Problems Worksheet.
Click the Assignment Files tab to submit your assignment.
Note. Computation methods may include the use of Microsoft® Excel®, SPSS™, Lotus®, SAS®, Minitab®, or byhand..

This Tutorial was purchased 10 times & rated A by student like you.
Resource:Statisticsfor Psychology
Complete the Week One Practice Problems Worksheet.
Click the Assignment Files tab to submit your assignment.
Note. Computation methods may include the use of Microsoft® Excel®, SPSS™, Lotus®, SAS®, Minitab®, or byhand..

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Two boats, the Prada (Italy) and the Oracle (USA), are competing for a spot in the upcoming America’s Cup race. They race over a part of the course several times. The sample times in minutes for the Prada were as follows: 12.9, 12.5, 11.0, 13.3, 11.2, 11.4, 11.6, 12.3, 14.2, and 11.3. The sam..

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. On a standard measure of hearing ability, the mean is 300, and the standard deviation is 20. Provide the Z scores for persons whose raw scores are 340, 310, and 260. Provide the raw scores for persons whose Z scores on this test are 2.4, 1.5, and 4.5.
2.&nb..

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Create a 12 to 15slide presentation using the information you gathered and submitted in Weeks 3 & 4. Include the following:
Describe the problem, and provide some brief background about the situation.
Explain the research hypothesis.
Descri..

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Analyze the data from Part 1 using Microsoft® Excel® software.
Write a 700 to 875word paper that includes the following information:
Describe what method you are using to compare groups.
Copy and paste the output into a Microsoft® Word document, and also answe..

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Select one of the following scenarios based on your particular field of interest in psychology:
Industrial/Organizational Psychology:
A few months ago, the upper management at a large corporation decided they wanted to make major changes in the organization. Lea..

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Provide a response to the following questions. Written responses should be at least 30 to 45 words each.
1. Explain and provide an example for each of the following types of variables:
a. &n..
