PSY 520 Graduate Statistics (PSY 520)

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...

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 1 Exercise Chapter One 1.8 Indicate whether each of the following studies is an experiment or an observational study. If it is an experiment, identify the independent variable and note any possible confounding variables. Chapter Two 2.14 (a) Construct a frequency distribution for the number of difference residences occupied by graduating seniors during their college career, namely 1, 4, 2, 3, 3, 1, 6, 7, 4, 3, 3, 9, 2, 4, 2, 2, 3, 2, 3, 4, 4, 2, 3, 3, 5 (b) What is the shape ...

PSY 520 Topic 3 Exercise Chapter 7 and 8 6.7 (a) Estimate whether the following pairs of scores for X and Y reflect a positive relationship, a negative relationship, or no relationship. Hint: Note any tendency for pairs of X and Y scores to occupy similar or dissimilar relative locations. (b) Construct a scatterplot for X and Y . Verify that the scatterplot does not describe a pronounced curvilinear trend. (c) Calculate r using the computation formula (6.1). 6.10 On the basis of an extensi...

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 ...

PSY 520 Topic 1 Exercise Chapter One 1.8 Indicate whether each of the following studies is an experiment or an observational study. If it is an experiment, identify the independent variable and note any possible confounding variables. Chapter Two 2.14 (a) Construct a frequency distribution for the number of difference residences occupied by graduating seniors during their college career, namely 1, 4, 2, 3, 3, 1, 6, 7, 4, 3, 3, 9, 2, 4, 2, 2, 3, 2, 3, 4, 4, 2, 3, 3, 5 (b) What i...