An ANOVA (Analysis of Variance) is used to determine whether or not there is a statistically significant difference between the means of…
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Statisticals Tutorials
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A density curve is a curve on a graph that represents the distribution of values in a dataset. It’s useful for three reasons:…
- Statisticals Tutorials
Qualitative vs. Quantitative Variables: What’s the Difference?
by Tutor AspireIn statistics, there are two types of variables: 1. Quantitative Variables: Sometimes referred to as “numeric” variables, these are variables that represent a measurable…
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Often researchers are interested in answering some question about a population, such as: What is the mean height of students at a…
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The general multiplication rule states that the probability of any two events, A and B, both happening can be calculated as: P(A…
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A split-plot design is an experimental design in which researchers are interested in studying two factors in which: One of the factors is…
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Permuted block randomization is a technique that can be used to randomly assign individuals in an experiment to a certain treatment within a…
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Latin hypercube sampling is a method that can be used to sample random numbers in which samples are distributed evenly over a…
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A pretest-posttest design is an experiment in which measurements are taken on individuals both before and after they’re involved in some treatment. Pretest-posttest designs can…
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Whenever you come across the term zα/2 in statistics, it is simply referring to the z critical value from the z table that corresponds…