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2. Chi-squared distribution - Wikipedia

   en.wikipedia.org/wiki/Chi-squared_distribution

   The simplest chi-squared distribution is the square of a standard normal distribution. So wherever a normal distribution could be used for a hypothesis test, a chi-squared distribution could be used. Suppose that Z {\displaystyle Z} is a random variable sampled from the standard normal distribution, where the mean is 0 {\displaystyle 0} and the ...

3. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   Aluminum is typically only used for full-view garage doors (doors that are made up of glass sections divided by aluminum stiles). Aluminum doors are rust-proof and low maintenance. Fiberglass and vinyl garage doors are composite units, combining a steel core behind a fiberglass or vinyl skin.

4. Yates's correction for continuity - Wikipedia

   en.wikipedia.org/wiki/Yates's_correction_for...

   This reduces the chi-squared value obtained and thus increases its p-value. The effect of Yates's correction is to prevent overestimation of statistical significance for small data. This formula is chiefly used when at least one cell of the table has an expected count smaller than 5.

5. Chi-squared test - Wikipedia

   en.wikipedia.org/wiki/Chi-squared_test

   A chi-squared test (also chi-square or χ 2 test) is a statistical hypothesis test used in the analysis of contingency tables when the sample sizes are large. In simpler terms, this test is primarily used to examine whether two categorical variables ( two dimensions of the contingency table ) are independent in influencing the test statistic ...

6. Pearson's chi-squared test - Wikipedia

   en.wikipedia.org/wiki/Pearson's_chi-squared_test

   For the test of independence, also known as the test of homogeneity, a chi-squared probability of less than or equal to 0.05 (or the chi-squared statistic being at or larger than the 0.05 critical point) is commonly interpreted by applied workers as justification for rejecting the null hypothesis that the row variable is independent of the ...

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