PSY 550 Complete All Weeks DQ Pack

PSY 550 Complete All Weeks DQ Pack -GCU

PSY 550 Complete All Weeks DQ Pack

PSY550

PSY 550 Week 1 Discussion 1 Latest-GCU

How does the scientific method point towards truth? What is truth, and how do you know when you have found it?PSY 550 Complete All Weeks DQ Pack

PSY 550 Week 1 Discussion 2 Latest-GCU

Contrast deductive and inductive reasoning, and explain how they can each be used to generate a hypothesis.

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PSY 550 Week 2 Discussion 1 Latest-GCU

Define reliability and validity in your own words. Briefly describe the different types of reliability and validity, including why it is important to conduct a study that is reliable and valid.

PSY 550 Week 2 Discussion 2 Latest-GCU

Stanley Milgram’s obedience to authority experiment is one of the most controversial studies in psychology’s history. Considering this example as well as others, critique such experiments from an ethical standpoint.

PSY 550 Week 3 Discussion 1 Latest-GCU

Discuss the proper placement and usages of a table and a figure within the manuscript.

Define the four general writing guidelines using APA style. Why is it important to write using these guidelines when communicating your study? Explain.

PSY 550 Week 3 Discussion 2 Latest-GCU

Discuss what stage in the publication process should potential authors talk about publication credit. Explain.

Describe how the sections of a poster, for presentation, are organized.

PSY 550 Week 4 Discussion 1 Latest-GCU

In your own words, define naturalistic observation. Discuss examples of when a naturalistic observational study would be the most appropriate design to select. What are two sources of bias during an observation period?

PSY 550 Week 4 Discussion 2 Latest-GCU

Discuss the advantages and disadvantages of the following nonexperimental research methods: (a) naturalistic observations, (b) surveys, and (c) correlational studies. If you were asked to use one of these designs in a study next week, which nonexperimental design would you select and why?

PSY 550 Week 5 Discussion 1 Latest-GCU

One of the best-known longitudinal designs is Lewis Terman’s study of giftedness. He began tracking gifted children into adolescence and adulthood in 1925; the study is supposed to conclude in 2020. Explain the unique benefits of such a study, and then explain the problems caused by this type of design.

PSY 550 Week 5 Discussion 2 Latest-GCU

Explain the circumstances when a quasi-experimental design would be preferable to a between-subjects design, but also discuss why an explanatory research method is superior to a predictive method.

PSY 550 Week 6 Discussion 1 Latest-GCU

Contrast the three types of factorial designs.

PSY 550 Week 6 Discussion 2 Latest-GCU

Lay out the design for two between-subjects experiments: (a) an experiment involving an experimental group and a control group, and (b) a factorial design with three independent variables that have 3, 2, and 2 levels, respectively.PSY 550 Complete All Weeks DQ Pack

PSY 550 Week 7 Discussion 1 Latest-GCU

Suppose that, for at-test, your computed value fort is +3.28. The critical value oft is +2.048. Explain what this means. Do you reject the null hypothesis or not? Now suppose that you have 28 degrees of freedom and are using a two-tailed (nondirectional) test. Draw a simple figure to illustrate the relationship between the critical and the computed values oft for this result.

PSY 550 Week 7 Discussion 2 Latest-GCU

Choose an article from the newspaper, an online source, or a magazine, then identify the descriptive statistics included in the article. Were the statisitcs appropriately described in the article? Explain. Discuss if the descriptive statistics used in your source supported the arguments made in it. Were the descriptive statistics misleading? Explain.

PSY 550 Week 8 Discussion 1 Latest-GCU

Design a 10-12 slide PowerPoint presentation (not including title and reference slides) focusing on the Research Proposal: Project Paper (submitted last week). Consider aforementioned elements in the Research Proposal:

1. Introduction/Hypothesis

2. Method

3. Results

4. Discussion

5. Figures and Tables (total of two from paper)

Make sure your reference slide matches the references from your proposal.

Include speaker notes below each content-related slide that represent what would be said if giving the presentation in person. Expand upon the information included in the slide and do not simply restate it. Please ensure the speaker notes include a minimum of 50 words.

PSY 550 Week 8 Discussion 2 Latest-GCU

A researcher computed the F ratio for a four-group experiment. The computed F is 4.86. The degrees of freedom are 3 for the numerator and 16 for the denominator.

1. Is the computed value of F significant at p < .05? Explain.

2. Is it significant at p < .01? Explain.

PSY550 Chapter 8, module 17, Exercises 2 and 4 Solved

2.To test the hypothesis in Exercise 1, the admissions counselors select a random sample of freshmen and compare their scores on the SAT to those of the population of upper classmen. They find that the freshmen do in fact have a higher mean SAT score. However, what they are unaware of is that the sample of freshmen was not representative of all freshmen at Brainy University. Infact, the sample over-represented those with high scores and underrepresented those with low scores. What type of error (Type I or Type II ) did the counselors make?

ANSWER: The counselors made a Type I error. They rejected the null hypothesis that there was no relationship between grade level and SAT score when in fact the sample was skewed and they could not conclude that.

 4.What are the appropriate H0 and Ha for each of the following research studies? In addition, note whether the hypothesis test is one-or two tailed.

 a.A study in which researchers want to test whether there is a difference in spatial ability between left-and right-handed people.

ANSWER: Ho: There is no significant difference in spatial ability between left and righthanded people. Ha: There is a significant difference in spatial ability between left and righthanded people. The test comes under two-tailed test

1. A study in which researchers want to test whether nurses who work 8-hour shifts deliver higher-quality work than those who work 12-hour shifts.

ANSWER: Ho: There is no significant difference in quality of work done by the nurses in 8 hr shifts and 12 hr shifts. Ha: The nurses work in 8 hr shift done quality work then when they work in 12 hr shifts. Test comes under Right one-tailed.

1. A study in which researchers want to determine whether crate-training puppies is superior to training without a crate. ANSWER: Ho: There is no significant difference between crate training puppies and training puppies without a crate. Ha: The crate training puppies superior than training without a crate. The test comes under left one-tailed test.

Chapter 8, module 18, exercises 2 and 4

2.What is the standard error of the difference between means?

ANSWER: The difference between the means of two samples, A and B, both randomly drawn from the same normally distributed source population, belongs to a normally distributed sampling distribution whose overall mean is equal to zero and whose standard deviation (“standard error”) is equal to square. root[(sd2/na) + (sd2/nb)] where:

  sd2 = the variance of the source population (i.e., the square of the standard deviation);

  na = the size of sample A; and nb = the size of sample B.

To calculate the standard error of any particular sampling distribution of sample-mean differences, enter the mean and standard deviation (sd) of the source population, along with the values of na and nb, and then click the “Calculate” button.

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is normally distributed. The data follow.

Males              Females

27                    25

25                    29

19                    18       

10                    23

16                    20       

22                    15       

• 19

1. What statistical test should be used to analyze these data? ANSWER: Two-sample T-test
2. Identify H0 and Ha for this study. ANSWER: Null: H0: There is no difference in study hours between male and female. Alternative: Hₐ: There is difference in study hours between male and female.
3. Conduct the appropriate analysis. ANSWER: Now since the data is normally distributed we can use the 2-sample t-test to test the Hypothesis. Here we can take our level of significance as 0.05 or a confidence level of 95%.
4. Should H0 be rejected? What should the researcher conclude? ANSWER: Ho is not rejected, and this means there is insufficient evidence here to reject the null hypothesis that the hours studied are different.
5. If significant, compute the effect size and interpret. ANSWER: T-Test of difference = 0 (vs not =): T-Value = -0.78 P-Value = 0.450 DF = 11

Individual Value Plot of Males, Females

Interpretation: Since the P-value(0.450) is greater than the significance level of (0.05) thus we can accept the null hypothesis and say that there is no difference in study hours for male and female.

1. If significant, draw a graph representing the data. ANSWER: Difference is not significant, thus no graph needed, because of interpretation:

Since the P-value(0.450) is greater than the significance level of (0.05) thus we can accept the null hypothesis and say that there is no difference in study hours for male and female.

References

Jackson, S. (2014). Research Methods: A Modular Approach (3rd ed). Belmont, CA: Wadsworth/Cengage Learning.