Examlex
Washers serve as a cushion or a bearing surface for a bold head or nut.
Chi-Squared Test
A statistical test used to determine if there is a significant difference between observed frequencies and expected frequencies in categorical data.
Population Variance
Population variance quantifies the dispersion of a population's values, measuring how each value differs from the mean of the population.
Chi-Squared Test
A statistical test used to determine the significant difference between observed frequencies in one or more categories and their expected frequencies.
Test Statistic
A calculated value from sample data used to make a decision on whether to reject the null hypothesis in statistical hypothesis testing.
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