Question

Chi-square is used to analyze:
Select one:
a. Frequencies
b. Ranks
c. Scores
d. Wavelength Excel?

Answer 1

Chi-square test is used to analyze "Frequencies". (option a)

• Pearson's Chi-square test also called simply, the Chi-square test, is a hypothesis test that is used in statistics to analyze the observed and expected frequency, usually. It is also written as the χ² test. (χ: the Greek letter Chi).
• The  Chi-square test is used to establish whether the expected and observed frequencies differ significantly, in one, or more than one category of a contingency table.
• Thus, the correct answer will be 'Frequencies' that is, 'option a'.

#SPJ3

Answer 2

Answer:

The chi-square statistic is a test that measures how a model compares to the actual observed data.

Step-by-step explanation:

Chi-square test is used to analyze Frequency.

• The chi-square test, also written as the χ2 test, is a statistical hypothesis test that can be performed when the test statistic is chi-squared under the null hypothesis, specifically the Pearson chi-square test and its variants.

• The Pearson chi-square test is used to determine whether there is a statistically significant difference between the expected frequencies and the observed frequencies in one or more categories of the pivot table.

• In standard applications of this test, observations are classified into mutually exclusive classes.

• If the null hypothesis is true (that there is no difference between classes in the population), the test statistic calculated from the observations follows a χ2 frequency distribution.

• The purpose of the test is to evaluate how likely the observed frequencies would be if the null hypothesis were true.

#SPJ3