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The independent variable in ANOVA must be categorical (either nominal or ordinal). The dependent variable must be scale (either interval or ratio). However, it is possible to recode scale variables to categorical and vice versa in order to perform ANOVA. While this is a common practice in many Social Sciences, it is controversial. I have also seen studies where ordinal data is treated as scale in ANOVA. Personally, I do not endorse either practice as they are tailoring the data to fit the test instead of the proper method of selecting a test that fits the data.

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14y ago

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Why is ANOVA used for interval and ratio level data only and not used for nominal or ordinal level data?

ANOVA (Analysis of Variance) is used for interval and ratio level data because it relies on the assumption that the data is continuous and normally distributed, allowing for meaningful calculations of means and variances. Nominal and ordinal data do not meet these criteria; nominal data consists of categorical variables without a numerical relationship, while ordinal data has a ranked order but does not provide equal intervals between ranks. Consequently, ANOVA is not appropriate for these data types as it cannot accurately assess differences in means or variances.


The null hypothesis for an anova states that?

The null hypothesis for a 1-way ANOVA is that the means of each subset of data are the same.


What is the null hypothesis tested by an ANOVA?

ANOVA test null hypothesis is the means among two or more data sets are equal.


Is BMI a nominal or ratio data?

nominal


Is length nominal data?

If you are bothering to measure it, it probably is not nominal data in your study.


Is marital status nominal data?

Yes, marital status is nominal data.


Can a histogram be used to display and analyze nominal data?

No, it is not suitable for nominal data.


Is marital status a nominal data?

Yes, marital status is nominal data.


What type of data is produced by simple category scales?

Nominal


Are bar and pie charts part of nominal data?

They are part of nominal data if the study is about different kinds of methods for displaying statistical data.


What does the acronym ANOVA stand for?

The abbreviation ANOVA stands for analysis of variance. It is used for carrying out comparative analysis of the statistical methods to determine if there is any relationship between data points.


How is data anylazed?

It depends on the type of data you are analyzing. For research, common methods for analyzing data are t-tests, ANOVA, MANOVA, and chi-square.