SPSS: Correlation (Pearson, Spearman, scatterplots)

Рет қаралды 71,076

Virginia Wickline

5 жыл бұрын

Recorded with screencast-o-matic.com

Пікірлер: 33

@3degreezcold 3 жыл бұрын

I learned more from this 11 minute video than my two years of graduate school. You are a phenomenal instructor, you provide relatable examples and easy to remember rules and guidelines for statistical analyses. THANK. YOU! 🙏🏾👏🏾

@virginiawickline2609 2 жыл бұрын

Thank you for your kind words. I am so pleased it helped!

@IFNp96 11 ай бұрын

Thank you so much. I was having trouble deciding wether Pearson or Spearman were appropiate. I now know its Spearman.

@virginiawickline2609 11 ай бұрын

Hooray!

@huakbar4398 2 жыл бұрын

That was an amazing, very informative video. Thanks so much, Blessings.

@virginiawickline2609 2 жыл бұрын

Many thanks, Najla, for your kind words. So glad it was helpful!

@virginiawickline2609 2 жыл бұрын

My pleasure, Najla!

@dr.sidrairfan4794 3 жыл бұрын

you explain so well and provide useful information. i want u to make more videos on statistics and spss

@virginiawickline2609 2 жыл бұрын

Thank you, Dr. Irfan!

@sneasnake6368 6 ай бұрын

Thank you so much for this video! I have a quick question: is it possible to do a spearman's rank correlation test with an ordinal variable (1-7 scale) and a nominal variable, for example age that have been sectioned into groups? If not, is there a way to see if there are any correlations between these two variables? Thanks again!

@virginiawickline2609 6 ай бұрын

Hi! My pleasure. Nominal variables should not be used with Spearman. If age has been chunked into 3 or more groups, it would be an ordinal variable as well and Spearman could be used. If age is just two groups, you would want an independent samples t-test or a point-biserial correlation.

@Untouched77 6 ай бұрын

what should i do if all my dots are clustered near the bottom? there's a lot of them so it just looks like a rectangle

@chantelleflynn9984 Жыл бұрын

thank you SOOOOOOOOOOOOOOOOOOOOO much

@virginiawickline2609 Жыл бұрын

My pleasure!

@V_3707 Ай бұрын

This is very helpful. Thank you so much. Is there any specific marker to check the distribution? Or is it just the histogram? How do we write that in the paper? Is it just by looking at the histogram?

@umbertocalleri5560 2 жыл бұрын

Hi! What is the best way to plot a spearman correlation so that we clearly see the information that it is giving? I think it's not useful to plot a regression line as it depends on outliers, while the spearman correlation doesn't.

@virginiawickline2609 2 жыл бұрын

Hi! I sometimes still plot a regression line or a Loess curve to see where the data change directions. I am open to options/suggestions from other viewers!

@ferretity Жыл бұрын

if there are a lot of cases clumped together, what kind of graph can we use to show correlation? I have a statistically significant correlation between household income and credit debt, however the scatter plot looks clumped together...?

@virginiawickline2609 Жыл бұрын

Spearman would be more flexible and appropriate in this case - it can handle lumpy data better than Pearson

@SarkarSAziz 2 жыл бұрын

Thankyou so much

@virginiawickline2609 2 жыл бұрын

My pleasure :)

@cococnk388 2 жыл бұрын

Stats is so interesitingggggg

@virginiawickline2609 Жыл бұрын

Hi Coco - haha. Maybe not - but it is useful! ;)

@fadhilfp6 Жыл бұрын

Thanks a lot, Madam, for your lovely explanation. My question related to the normality: Can we run a normality test (Shapiro or k-s test) to make a decision rather than usage figures, because for beginners like me, I can not judge on the normality from figure or you must decided on figures. Thanks in advance

@virginiawickline2609 Жыл бұрын

My pleasure! Absolutely a normality test is appropriate. I run out of time to also teach this during my class (which is the primary audience for this video), but if I were doing it myself for research, I would rely on a K-S (Komolgorov-Smirnov) test myself.

@fadhilfp6 Жыл бұрын

@Virginia Wickline So, if the normality is violated, then the spearmen coefficient is a suitable alternative for pearson to make the correlation or not mandatory

@virginiawickline2609 Жыл бұрын

@@fadhilfp6 If normality is violated, Spearman is more appropriate. For more, see: stats.stackexchange.com/questions/3730/pearsons-or-spearmans-correlation-with-non-normal-data