Analysis of variance (ANOVA) can determine whether the means of three or more groups are different. Example 1): Let’s say they are couple of colleges in your area and you want to know which college give the best performance(In this case all students took same exam from different colleges) Example 2): Lets say I have threeContinue reading “Analysis of variance (ANOVA)”
Category Archives: Hypothesis
One way ANOVA calculation
Lets calculate one way ANOVA with the below dataset. Assumptions: Null Hypothesis = H0: µ1=µ2=µ3 Alternative Hypothesis= Ha: µ1!=µ2!=µ3 Calculate the Mean: Grand Mean: Mean of all sample means or mean for all observation from all samples Between Group Variability: When you see below image the two different samples isContinue reading “One way ANOVA calculation”
What is Hypothesis
A tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts. A message expressing an opinion based on incomplete evidence What is Hypothesis testing: Proving either our assumptions or Hypothesis is either true or false.In a scientific/statistics, a proposed and testable explanation between twoContinue reading “What is Hypothesis”
Calculating Two sample Paired/Dependent T test:
This is used to test the statistical difference between two means from two different populations. For example, a two-sample hypothesis could be used to test if there is a difference in the mean salary between male and female software engineers in the Bangalore area It is divided into two types. TwoContinue reading “Calculating Two sample Paired/Dependent T test:”
Difference between Z-test, F-test, and T-test
Z-Test: A z-test is used for testing the mean of a population versus a standard, or comparing the means of two populations, with large (n ≥ 30) samples whether you know the population standard deviation or not. It is also used for testing the proportion of some characteristic versus a standard proportion, or comparing theContinue reading “Difference between Z-test, F-test, and T-test”
How to calculate One sample T test
The One Sample T test determines whether the sample mean is statistically different from a known or hypothesized population mean. Or The one-sample t-test is used to determine whether a sample comes from a population with a specific mean. Sometimes we might know the population mean or sometimes populationContinue reading “How to calculate One sample T test”
Data and Machine by viswateja 