Question

the other name of chi square goodness of fit test is​

Answer 1

A chi-square test, also written as χ2 test, is a statistical hypothesis test that is valid to perform when the test statistic is chi-square distributed under the null hypothesis, specifically Pearson's chi-square test and variants thereof.

Answer 2

Let’s look at the delicacy data and the Chi-square test for virtuousness of fit using statistical terms. This test is also known as Pearson’s Chi-square test.

Our null thesis is that the proportion of flavors in each bag is the same. We've five flavors. The null thesis is written as

H0p1 = p2 = p3 = p4 = p5

The formula above uses p for the proportion of eachflavor.However, also the bag contains 20 pieces of each flavor, If each 100- piece bag contains equal figures of pieces of delicacy for each of the five flavors. The proportion of each flavor is 20/ 100 = 0.2. Unlike other suppositions that involve a single population parameter, we can not use just a formula. We need to use words as well as symbols to describe ourhypotheses.In the formula over, we've n groups. The

∑

symbol means to add up the computations for each group. For each group, we do the same way as in the delicacy illustration. The formula shows Oi as the Observed value and Ei as the Anticipated value for a group.

We also compare the test statistic to a Chi-square value with our chosen significance position( also called the nascence position) and the degrees of freedom for our data. Using the delicacy data as an illustration, we set α = 0.05 and have four degrees of freedom.

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