Examlex
At what level does A.C. Nielsen measure the television audience demographics?
Null Hypothesis
A default hypothesis that there is no effect or no difference, and any observed deviation in data is due to chance.
Degrees Of Freedom
The number of independent values or quantities which can be assigned to a statistical distribution minus the number of parameters estimated.
Significance Level
The probability of rejecting the null hypothesis in a statistical test when it is true, commonly set at 0.05 or 5%.
Chi-Square Value
A statistic that measures the difference between observed and expected frequencies to test for independence in categorical variables.
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