Similarities and differences between null and alternative hypotheses Null and alternative hypotheses are similar in some ways: They’re both answers to the research question. They…
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…