psy 520 graduate statistics (PSY 520)

PSY 520 - Topic 1- 8 DQ-1&2/PSY 520 - Topic 1- 8 DQ-1&2. Topic 1 DQ 1 Review the levels of measurement terms in the Statistics Visual Learner media piece. Compare and contrast Stevens's four scales of measurement, and explain when each type of scale should be used. The four levels of measurement that were first proposed by S. S. Stevens are nominal, ordinal, interval and ratio types of data. Nominal scales, which are also referred to as classificatory scales, use numbers, labels, o...

CONTAINS PSY520_Topic 6 Exercises(QUESTIONS AND ANSWERS)

PSY 520 Topic 7 Assignment, MANOVA Project /PSY 520 Graduate Statistics

PSY-520 Topic 2 Exercises – Chapters 5 & 8. SOLUTIONS SHOWN STEP BY STEP

PSY 520 Topic 4 Exercise, Chapter 9, 10, 11 and 12 9.7 Define the sampling distribution of the mean. 9.8 Specify three important properties of the sampling distribution of the mean. 9.9 If we took a random sample of 35 subjects from some population, the associated sampling distribution of the mean would have the following properties (true or false). 9.13 Given a sample size of 36, how large does the population standard deviation have to be in order for the standard error to be 9....

PSY 520 Topic 6 Exercises 16.9 Given the aggression scores below for Outcome A of the sleep deprivation experiment, verify that, as suggested earlier, these mean differences shouldn’t be taken seriously by testing the null hypothesis at the .05 level of significance. Use the computation formulas for the various sums of squares and summarize results with an ANOVA table. 16.10 Another psychologist conducts a sleep deprivation experiment. For reasons beyond his control, unequal numbers of subj...

PSY 520 Topic 7 Exercises 19.9: A) Using the .01 level of significance, test the null hypothesis that in the underlying population, crimes are equally likely to be committed on any day of the week. B) Specify the approximate p -value for this test result. C) How might this result be reported in the literature? 19.10: While playing a coin-tossing game in which you are to guess whether heads or tails will appear, you observe 30 heads in a string of 50coin tosses. A) Test the null hypothesis ...

PSY 520 Topic 2 Exercise 5.11 Scores on the Wechsler Adult Intelligence Scale (WAIS) approximate a normal curve with a mean of 100 and a standard deviation of 15. What proportion of IQ scores are 5. 15 An investigator polls common cold sufferers, asking them to estimate the number of hours of physical discomfort caused by their most recent colds. Assume that their estimates approximate a normal curve with a mean of 83 hours and a standard deviation of 20 hours. 5.18 The body mass index ...

Correlation and Regression Report Select at least three variables that you believe have a linear relationship, and specify which variable is dependent and which are independent. Describe your data collection technique and why it was appropriate as well as why the sample size was best. Find the correlation coefficient for each of the possible pairings of dependent and independent variables and describe the relationship in terms of strength and direction. 4. The following goodness of fit sc...

13.6 It’s well established, we’ll assume, that lab rats require an average of 32 trials in a complex water maze before reaching a learning criterion of three consecutive errorless trials. To determine whether a mildly adverse stimulus has any effect on performance, a sample of seven lab rats were given a mild electrical shock just before each trial. 13.8 Assume that on average, healthy young adults dream 90 minutes each night, as inferred from a number of measures, including rapid eye mov...