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Can I change the level of measurement?

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Ellijah
26 November 2019
Can I change the level of measurement?

Can I change the level of measurement?

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Ellijah
26 November 2019

Got it, thanks ?.

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Dr. MEL
26 November 2019

Parametric statistic: One-way ANOVA
Non-parametric alternative: Kruskal-Wallis’s test

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Ellijah
26 November 2019

I also want to compare three groups, instead of two groups. Which way I should adopt?

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Ellijah
26 November 2019

Thank you Dr. MEL and Colin!!

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Dr. MEL
26 November 2019

The assumptions are as follows:
• Normality: Data are normally distributed
• Homoscedasticity: Data from multiple groups have the same variance
• Linearity: Data have a linear relationship
• Independence: Data are independent

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Ellijah
26 November 2019

What are parametric assumptions?

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Dr. MEL
26 November 2019

Please consider using a non-parametric alternative, which is Wilcoxon sign test, instead of paired sample t-test. Many thanks.

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Ellijah
26 November 2019

Thx. But if my data don’t meet parametric assumptions, what should I do?

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Dr. MEL
26 November 2019

Please consider using paired samples t-test. Thanks.

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Ellijah
26 November 2019

I want to measure if there is a change in participants’ scores of subjective well-being from Wave 1 to Wave 2. Which statistical technique is required?

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Colin
26 November 2019

Yes, but you need to assess the benefits and disadvantages carefully when considering changing the level of measurement. To change a continuous variable to a nominal variable, you can collapse the continuous variable into a number of categories. To change a nominal variable to a continuous variable, a number of dummy variables can be created.

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