Properties of the Standard Normal Distribution

Properties of the Standard Normal Distribution

The normal distribution probability is specific type of continuous probability distribution. A normal distribution variable can take random values on the whole real line, and the probability that the variable belongs to any certain interval is ...
Statistics Tutorials – Z Scores

Statistics Tutorials – Z Scores

Assume that \(X\) has a normal distribution, with mean \(\mu\) and standard deviation \(\sigma\). This is typically written as \ Then, the Z-score associated to \(X\) is defined as \ Example: Consider the random variable \(X\), which as a normal ...
Hypothesis Testing (Part 2)

Hypothesis Testing (Part 2)

Null Hypothesis Now it is time to talk a bit about the null hypothesis. We said that the main idea of hypothesis testing is, simply put, a way of validating or evaluating the likelihood of a certain statements about a population parameter (typically ...
Hypothesis Testing (Part 1)

Hypothesis Testing (Part 1)

Hypothesis testing represents a very important part of Statistics, and it is usually misunderstood in terms of the the objectives and methodology. First of all, let me tell first what hypothesis testing is (and then I’ll tell you what is not): ...
Qualitative Data Analysis

Qualitative Data Analysis

Qualitative data analysis refers to one form of systematic analysis of data for the purpose of increasing knowledge and understanding of a theme, topic, or question. The types of data that correspond to this approach to research can include numbers, ...
How to Compute Z-Scores

How to Compute Z-Scores

Assume that \(X\) has a normal distribution, with mean \(\mu\) and standard deviation \(\sigma\). This is typically written as \ Then, the Z-score associated to \(X\) is defined as \ Example: Consider the random variable \(X\), which as a normal ...



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