ANOVA or Analysis of Variance is conducted to determine the significant differences between the means of three or more independent variables.
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If you want to test whether the % of people who report themselves to be very happy has changed during the time that the test has been conducted. A special case of the chi square test for independence is the test.
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A chi square (X2) statistic is used to investigate whether distributions of categorical variables differ from one another. Categorical variables like; gender of sample population which could be either male or female.
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When using this statistical test, you are testing the null hypothesis that 2 population means (average) are equal. The alternative hypothesis is that they are not equal.
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In order to determine the relationship between dependent variable and a set of multiple independent variables, linear regression analysis is conducted.
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