How to write null and alternative hypotheses To help you write your hypotheses, you can use the template sentences below. If you know which statistical…
The exact procedure for performing a Pearson’s chi-square test depends on which test you’re using, but it generally follows these steps: Create a table of…
There are two types of Pearson’s chi-square tests, but they both test whether the observed frequency distribution of a categorical variable is significantly different from its expected…
Skewness and kurtosis are both important measures of a distribution’s shape. Skewness measures the asymmetry of a distribution. Kurtosis measures the heaviness of a distribution’s tails relative to a normal distribution.…
What is a leptokurtic distribution? A leptokurtic distribution is fat-tailed, meaning that there are a lot of outliers. Leptokurtic distributions are more kurtotic than a normal distribution.…
What is a platykurtic distribution? A platykurtic distribution is thin-tailed, meaning that outliers are infrequent. Platykurtic distributions have less kurtosis than a normal distribution. In other words, platykurtic…
Types of kurtosis Distributions can be categorized into three groups based on their kurtosis: Category Mesokurtic Platykurtic Leptokurtic Tailedness Medium-tailed Thin-tailed Fat-tailed Outlier frequency Medium…
The main objective of the study is to examine the statistical analysis of coal production in Nigeria (1990-2020). The specific objectives of the study…
What is a t-distribution? The t-distribution is a type of normal distribution that is used for smaller sample sizes. Normally-distributed data form a bell shape when plotted…
A number that describes a sample is called a statistic, while a number describing a population is called a parameter. Using inferential statistics, you can make conclusions about…