Identifying Outliers in SPSS

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Identifying Outliers in SPSS

Рет қаралды 104,617

Dr. Todd Grande

Күн бұрын

Пікірлер: 32

@annette2194 9 ай бұрын

You have single handedly saved my degree bless up Todd

@tracithomas5427 5 жыл бұрын

I have watched a few of your tutorials and am grateful for your thorough and easily understood directions and explanations. You have helped decreased my fear and increased my confidence!

@MrsBobDylan 7 жыл бұрын

This video was explained well and I think I understood the information. The step-by-step instructions throughout the video were helpful.

@ashleymegahan5966 6 жыл бұрын

This video was very informative. I found it interesting to learn how to determine the outlier (-2.68 and 2.68). It has been a few years since I have used SPSS, but I think this video did an excellent job at showing how SPSS can organize your data

@ms.brandihoward6871 5 жыл бұрын

Thank you for your great explanation! It has made stats a little easier to answer.

@ritusam1 6 жыл бұрын

I think it is a great video. I did step by step as Dr. Grande instructed and I was able to get the outliers for my variables. Thank you.

@remygooch1393 5 жыл бұрын

Very helpful and informative video on identifying outliers, especially remembering to rerun Z scores after adjusting data.

@yardenlevy3182 4 жыл бұрын

You are the best Dr. Grande

@TheWolvesII 4 жыл бұрын

Thank you for your videos! I'm wondering what to DO about outliers? What are the options, what is usually expected from students vs. mayeb researchers, what is most common...?

@ushalincoln2546 7 жыл бұрын

I think I remember some of this from undergrad and I think can be very useful when analyzing data.

@ayrton56612 5 жыл бұрын

When I run a box-plot I usually only pick out the extreme outliers with the little star sign. What would the z-score for an extreme outlier be?

@darthnikki677 5 ай бұрын

This video has been really helpful, but how do I know if my distribution is normal to use the z-score of 2.68? Do I need to run a further test in SPSS?

@kzlorenz 7 жыл бұрын

Hi Todd, nice video but slightly complicated method. Many thanks for your help.

@DrGrande 7 жыл бұрын

You're welcome - thanks for watching.

@greadion4 5 жыл бұрын

Hi Dr. Grande. I love your explanation, but I do not understand what you mean by using Z scores for population and box plots for the sample. Isn't the box plot representing the same data? The IQRs have not changed. I would appreciate a response. Thank you :)

@ajboylan9338 Ай бұрын

Where are you getting the numbers -2.68 and 2.68?????

@ebrahimlari9241 6 жыл бұрын

Thank you for the well-explained video. How about the outliers within the groups? What is the best test for those?

@amandagerrick5407 7 жыл бұрын

I also found this video a little difficult to understand; however, I appreciated being walked step through step.

@zureezee1887 7 жыл бұрын

This video is well explained, but for someone who is not a statistician it is difficult to understand.

@hafizahusairi 5 жыл бұрын

Thank you! I more understand after watching your video =)

@Jennalouise139 5 жыл бұрын

Why any value less than -.2.65 or greater than 2.68?

@journeymantraveller3338 4 жыл бұрын

One definition of outliers is data that are more than 1.5 times the inter-quartile range before Q1 or after Q3. Since the quartiles for the standard normal distribution are +/-.67, the IQR = 1.34, hence 1.5 times 1.34 = 2.01, and outliers are less than -2.68 or greater than 2.68. Hence for normally distributed data, the probability of being an outlier is 2 times .0037 = .0074. This is less than 1%.

@gerrygramozis544 4 жыл бұрын

@@journeymantraveller3338 Do you have a reference for that definition of an outlier? Thank you.