Statistics How To

Probability > In game theory, a branch of math that models competition and conflict, a zero-sum game is where one person wins and the other loses. The net change in wealth for this type of game is zero, hence the name of the game. Gambling is an example of a zero-sum game; The wins of … Read more

SPSS for Beginners > Outliers in SPSS: Overview SPSS uses Tukey’s method to identify outliers, which are visible on boxplots. Finding outliers using that method can be thought of as a rule of thumb, not a statistical rule set in stone. While there are more advanced methods for finding outliers, like Grubb’s Test, SPSS doesn’t … Read more

Excel for Statistics > The Excel BINOM.DIST / BINOMDIST function is a way to create a binomial distribution from a set of data entered into a worksheet. Use this function to calculate probabilities for problems with: A fixed number of trials, Two outcomes: success or failure, Independent trials, Constant probability of success. BINOMDIST Excel Example … Read more

SPSS for Beginners > A Two Way ANOVA in SPSS has two independent variables. You would use a two way ANOVA when you have one measurement (scale) variable and two nominal variables. In the hypothetical example that follows, we are studying how brand of cleaner and water temperature (both nominal variables) affect cleanliness level (a … Read more

SPSS for Beginners > The two major tests for normality in SPSS are the Shapiro-Wilk and KS Test. However, you can also check skewness, kurtosis, histograms, and QQ plots. All of this can be achieved with running a single analysis. There are many reasons for checking normality, but perhaps the most important is to check … Read more

Intro to SPSS > Paired Samples T Test in SPSS About the Paired Samples T Test in SPSS The purpose of the paired samples t test in SPSS is to find statistically significant differences between the means of two sets of related observations. For example, you may want to find out if a depression treatment … Read more

Statistics Definitions > Line Graph Contents: What is a Line Graph? How to make a Line Graph? How to make a line graph in Excel (video) What is a line graph? A line graph shows how values change. For example, you could plot how your child grows over time. Line graphs can also be used … Read more

Statistics Definitions > Contents: What is the Mann Whitney Test? Null Hypothesis Direct Method Assumptions How to run a Mann Whitney Test in SPSS (Video) What is a Mann Whitney U Test? The Mann-Whitney U test is the nonparametric equivalent of the two sample t-test. While the t-test makes an assumption about the distribution of … Read more

SPSS for Beginners > IBM SPSS Statistics is a software package for statistics. Originally geared towards the social science, the software is now a powerful statistics package widely used in a variety of business and science applications. SPSS contains many different options for how to make a histogram in SPSS, including the legacy chart builder. … Read more

Intro to SPSS Statistics > In SPSS, it’s important to choose the right level of measurement for each variable. About the SPSS Nominal Ordinal Scale options menu SPSS gives you three choices for levels of measurement: Nominal, Ordinal, and scale. Each of those levels gives you different amounts of analyzable information in SPSS. Various procedures … Read more