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Manual Event (Session ID,DateTime,Event) = pigqvcsrireul7a1bpcl7d0im7 20210919090756 /tc/communities/normality-of-variable/

normality of variable

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kursten
2019年11月26日
normality of variable

How I can check the normality of each variable?

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Jason Jiang
2020年2月20日

There are two main methods of assessing normality: graphically and numerically.

Graphical interpretation has the advantage of allowing good judgement to assess normality in situations when numerical tests might be over or under sensitive, but graphical methods do lack objectivity. If you do not have a great deal of experience interpreting normality graphically, it is probably best to rely on the numerical methods. SPSS Statistics allows you to test all of these procedures within Explore... command.

Reference: https://statistics.laerd.com/spss-tutorials/testing-for-normality-using-spss-statistics.php

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Hobbs
2020年2月10日

Then what to do if the scores is not normally distributed nor a straight line?

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imir88
2019年11月26日

It can be checked by using a scatterplot. When you look at a scatterplot of scores, a straight line should be shown (roughly), rather than a curve.

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kursten
2019年11月26日

Thanks imir. How about linearity?

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imir88
2019年11月26日

It can be checked by inspecting the histograms of scores on each variable. If the scores are normally distributed, you could see a bell-shaped curve.

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