Tag Archives forstatistics

Histogram vs. Bar Chart

A histogram is a graphical representation of data. It shows the distribution of values within a set of data. The bars represent the number of observations at each value. Bar charts are similar to histograms but instead of showing the frequency of observations, they show the probability of a discrete observation occurring. Histograms and Bar charts are […]

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Chi-Square Test vs. F Test

What is the difference between Chi-square test and F Test?Purpose:These two statistical procedures are used for different purposes.The chi-square test is used when you want to know whether there is a statistical difference between two categorical variables (e.g., gender and preferred car color).The F test, on the other hand, is used when you want to […]

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Nonparametric Tests

Nonparametric Tests in Minitab

A nonparametric test is any statistical procedure where no assumptions are made regarding the distribution of data. The most common types of nonparametric tests include:Kruskal-Wallis TestMann Whitney U TestWilcoxon Signed Ranks TestFriedman’s TestBefore we talk about the Nonparametric Tests, let’s understand what Parametric Tests are.Parametric Tests:These are hypothesis tests that assume that the data being […]

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Common Probability Distributions

 1. Normal Distribution:​Where:μ  = Meanσ  = Standard Deviationπ ≈ 3.141e ≈ 2.718​2. Binomial Distribution:​Where:p = Probability of successq = Probability of failure =  1−p​n = Number of trialsP(x) = Probability of x successes in n trials​3. Poisson Distribution:​Where:m = Probability of successP(x) = Probability of x successes.

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Top Three Measures of Central Tendency

Three commonly used measures of central tendency are: Mean, Median and Mode. 1. Mean: Mean is also commonly known as the average, e.g., the average income of the country, the average height of people, etc. The mean is the most commonly used measure of central tendency. Formula: Example: Find the mean of 10, 11, 14, […]

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