Why Do We Use Nonparametric Tests?

Why do we use nonparametric tests? Describe a psychological research situation or scenario that would use a non-parametric test. Why would the non-parametric test be used? I thought it was rather peculiar as we were learning about hypothesis testing that the assumption of a normal distribution was always there. I know that the text has... Continue Reading →

t-Test For Dependent Means

What is an example of a situation in which you would use a t Test for dependent means? You would use this type of t-Test when using two scores from the same population. For instance, if you were to want to score a person before and after a certain type of counseling, you would use... Continue Reading →

Statistical Tables and Software Packages

How have software packages made statistical tables obsolete? Do statistical tables change over time? Why or why not? If not for the statistical tables and software packages, how would you derive the values contained in the statistical tables? I don’t think that software packages have made statistical tables absolutely obsolete. Statistical tables are learning tools... Continue Reading →

Null and Alternative Hypotheses

What are some terms related to hypothesis testing that you are already familiar with? Why does a null and alternative hypothesis have to be mutually exclusive? I actually did not know any specific terminology related to hypothesis testing. I can remember from high school that a hypothesis has to be testable. It is not just... Continue Reading →

Hypothesis Testing Presentation

Slide 2 Notes The research topic that will be addressed is of a hypothetical nature and therefore the data is also largely hypothetical. With that in mind, the comparison distribution is a distribution of means of the 44 pre-k classes in a particular school district. For the past year the school district has kept records... Continue Reading →

Descriptive and Inferential Statistics

Statistics are widely used when conducting research, and the field of psychology is no exception. Statistics are used in psychology for all research and has made categorizing disorders possible. Statistics have helped accomplish a number of feats and they are important for a variety of reasons. The purpose of this paper is to describe the... Continue Reading →

The Five Steps of Hypothesis Testing

List the five steps of hypothesis testing and explain the procedure and logic of each. a. Restate the question as a research hypothesis and a null hypothesis about the population: Population 1 is the population that represents the general population, or at least the general population concerned with the area that the researcher is studying.... Continue Reading →

Median vs. Mean Home Price

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? Well technically speaking, the median (exact middle) home price is the 50th percentile and the mean (sum/x = mean) is the average home price. As I understand it, central... Continue Reading →

Understanding Mean, Median, and Standard Deviation

Chapter 2 For the following scores, find the:Mean: 2Median: 2SS: 56Variance: 2.67Standard Deviation: 1.67For the following scores, find the:Mean: 1312.40Median: 1361 SS: 76089.20Variance: 15217.84Standard Deviation: 123.36For the following scores, find the:Mean: 3.17Median: 3.25SS: .53Variance: .09SD: .30A psychologist interested in political behavior measured the square footage of the desks in the official office of four U.S.... Continue Reading →

Research, Statistics, and Psychology

The scientific method is the instrument by which humanity is able to overcome the chains of subjectivism, turn from the shadows of pattern and prediction, and face the blinding light of causality. As to psychology, the scientific method is the main avenue through which research concerning cognition, behavior, and mental functionality is carried out; and... Continue Reading →

How Would You Define Research?

How would you define research? How can research help your organization save money? How do statistics relate to research? At the onset of this class, with only reading the first chapter of the textbook, I would describe research as a systematic approach to the predication of future events in light of reproducible, measurable experimentation. My... Continue Reading →

Explanation of Variables, Distribution, and Symmetry as They Pertain to Statistics

Explain and give an example for each of the following types of variables:Equal-Interval: Variables in which there are equal distances between each value. An example of equal-interval variables would be S.A.T. scores.    Rank-Order: Variables in which the values represent relative standing to other values. An example of rank-order variables would be the order in which... Continue Reading →

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