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What If Your Data Are Not Normally Distributed? Should You Use Parametric or Non-Parametric Statistics?
Can you analyse data that are not normally distributed? Learn how Normality Tests, Sample Size and Outliers can help you choose between Parametric and Non-Parametric Statistics.
Data Investigator Team
6 days ago3 min read
How Many Participants Should a Research Study Have? What Is the Right Sample Size?
How many participants does a research study need? Understand Sample Size, why 384–400 is common, and approaches including Cochran, Yamane, Krejcie & Morgan and Power Analysis.
Data Investigator Team
6 days ago9 min read
How Many Points Should a Likert Scale Have? Comparing 4-, 5- and 7-Point Scales for Research
Should you use a 4-, 5- or 7-point Likert scale? Compare their differences, research examples and effects on data to choose the right scale for your questionnaire.
Data Investigator Team
6 days ago9 min read
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