@@alihyaa_me I'm a bit late but ABS is absolute value of a number. It calculates the distance between the number and zero, making every number positive (distance between -4 to 0 is the same as distance between 4 to 0)
best statistics explanations anywhere for all statistical tests. My students (and me) find these videos indispensable. You do an amazing job explaining not just how but why!
why is DF=N-2? looking for info, it says that it's minus the parameters used as intermediate steps. In the example I saw elsewhere, only the mean was considered so it was minus 1. Is it -2 in this case because we are considering Pearson Coefficient as well?
Hi, Thank you very much for this beneficial and concise lecture. I wonder if you can give a lecture about IBR (Integrated Biomarker Response). Thanks indeed,
When I write the Pearsons formula..what I mark in the next parentheses..cannot mean both columns at once..consequently..I can no longer calculate..that can you help me if you can @Top Tip Bio
Interesting - my T.DIST gives the options (x, deg_freedom, cumulative) there is no tail option. I wonder if it's just due to version differences between my excel and the one in the tutorial...?
I get a number error when I do the p-value step. In my data set my t-statistic is a negative number - I wonder if I need to add the ABS function as illustrated in the Spearman correlation video?
Chale, please what does the p value mean? When it is less than 0.05 does it mean there is a high correlation? and when there is a negative correlation and the p value is greater than 0.05 what does it mean?
Excellent explanation. Thank you. Just one question, how I know if the two variables are actually correlating or not... what is the minimum value of correlation (r) that I need to obtain to say that the two variables are correlating? Thank you.
Thanks Diana. So, I actually have a video that is coming out tomorrow that will cover this in more detail - I recommend you watch it. But essentially, if you want to look to see if there is a statistically significant correlation, then you need to look at the p-value. Usually if p0.7 indicates a strong positive correlation.
Hi - in your other video for spearmans rs you used ABS in the formula for the t stat incase rs is negative. Is this the same case for pearsons t stat formula? how do you include abs?
Hi Nina. Yes it is also best to use here too. The ABS function just makes sure that the Pearson correlation coefficient is a positive number. Otherwise there may be an error. I forgot to add the ABS function when I made this video - doh
When I’m calculating the p value, when some numbers are negative it keeps coming up as “NUM” and I’m unsure how to fix that. When they’re all positive numbers it works fine
Hi Chloe. So this is a slight error on my part. The process I shown cannot use negative Pearson correlation coefficient values to calculate the P value. Instead, either manually change the negative correlation value to positive or use the =ABS formula in a new cell and use the cell containing the negative value as the input. The P value will be the same regardless of whether the same correlation value is negative or positive. So a correlation coefficient of -0.76 will give the same P value (when using the same degrees of freedom) when using a correlation coefficient of 0.76
Hi Adi, So this process cannot use negative Pearson correlation coefficient values to calculate the P value. Instead, either manually change the negative correlation value to positive or use the =ABS formula in a new cell and use the cell containing the negative value as the input. The P value will be the same regardless of whether the same correlation value is negative or positive. So a correlation coefficient of -0.76 will give the same P value (when using the same degrees of freedom) when using a correlation coefficient of 0.76
@@StevenBradburn thank you so much for answering. You help me so much.. Big thanks 👍 I want to ask again please.. Is the Pearson coefficient is the same whether it's negative or positive right? But the impact is whether it related (+) or inversely related (-)?
@@adinugraha1276 the final P value will be the same. The positive or negaive correlation coefficient value relates to direction of the association between the two variables. Either a positive or negative association
As your p value is so small, it is not being displayed in decimal places in Excel. Right click on the cell and click on Format Cell. Then choose the style as number and select the number of decimals you want to see
Hello, For a Pearson correlation, the df is n-2. This is because there are two variables in a Pearson correlation (eg, BMI and age). Many thanks, Steven
For some reason, it does not present the option of a one tailed or a two tailed test on excel. Instead it comes with 1. cumulative frequency.... and 2. probability density. Edit: I clicked on T.DIST instead of TDIST.
![Pearson correlation [Simply explained]](/img/n.gif)
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be careful the 2 tailed TDIST command does not work with negative T statistic
Use the command =2*T.DIST.RT(ABS(Tstatistic),degreesFreedom)
Thanks Max. I realised this after I made the video (doh!). I've corrected the online guide to reflect this :) many thanks
What does "ABS" mean in this equation?
@@sarahantony6076 Absolute Value of a number
Omg I still don't get it what's rt? And abs?
@@alihyaa_me I'm a bit late but ABS is absolute value of a number. It calculates the distance between the number and zero, making every number positive (distance between -4 to 0 is the same as distance between 4 to 0)
Simple to follow. Excellent presentation. Thank you
best statistics explanations anywhere for all statistical tests. My students (and me) find these videos indispensable. You do an amazing job explaining not just how but why!
AMAZING! AND SUPER EASY! THANK YOU SO SO MUCH! you saved me! I understood how to calculate like in 10 seconds!!!!!
You've been a lifesaver in my Stats for Behavioral Sciences class ( Psych/625) Next week will be my very last class... I may need this for my PsyD...
Thanks, simple and helpful !
Such simplicity! I loved your video tutorial.
Thank you
Thank you so much. Very helpful and easy to follow.
I paid thousands of rupees to statistician to do this and results match! good video, thanks.
Thank you for this video, I did it step by step alongside your video and it really helped me, thanks again :D
Nice! I still like doing it longhand aided by Excel makes me remember things better than some canned software
I completely agree
Thank you! Really helpful for my thesis! ❤️❤️❤️
Excellent explanation of how to perform the significance test in EXCEL 👍👍
This is a great video! Thank you very much for the explanation! It saved my butt big time!
wow !! excellent explanation for my next analysis
Thanks! Helped me for work project.
Thank u so much , my problem got resolved
Very clear and useful.
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You are very welcome
Thank you so much bro
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why is DF=N-2? looking for info, it says that it's minus the parameters used as intermediate steps. In the example I saw elsewhere, only the mean was considered so it was minus 1. Is it -2 in this case because we are considering Pearson Coefficient as well?
Informative Video
Thanks very much for your explanation, I'd like to ask that the DF should always be -2?
You're welcome. Yes, for the Pearson correlation the DF is n-2 since there are two parameters in the test (variable 1 and variable 2)
thank you it is very helpful :)
Great job.
Great, thank you
Thank you
THANK YOU! You saved me!!
This helps me a lot
Glad it helped Ronelyn
Hi,
Thank you very much for this beneficial and concise lecture.
I wonder if you can give a lecture about IBR (Integrated Biomarker Response).
Thanks indeed,
Bang on! Thanks!! :)
thank you, very helpful
thank you maybe now I can get my degree!
Thank you very much!
You're welcome!
When I write the Pearsons formula..what I mark in the next parentheses..cannot mean both columns at once..consequently..I can no longer calculate..that can you help me if you can @Top Tip Bio
Hi Steven, Whats the difference this formula and CORREL in Excel ?
hello sir ,good day...I have a sample if I.Q. scores and General Average grade samples...how do I know what is the ''N''?
THANK YOU SO MUCH
Interesting - my T.DIST gives the options (x, deg_freedom, cumulative) there is no tail option. I wonder if it's just due to version differences between my excel and the one in the tutorial...?
I get a number error when I do the p-value step. In my data set my t-statistic is a negative number - I wonder if I need to add the ABS function as illustrated in the Spearman correlation video?
Thankyouuuuuuu
God bless you
Thank you!!!!
You're welcome!
Chale, please what does the p value mean? When it is less than 0.05 does it mean there is a high correlation? and when there is a negative correlation and the p value is greater than 0.05 what does it mean?
Your videos are excellent.
If the correlation coefficient (r) is negative I get the error in the p value of. # NUM. How can I address this please?
Apologies about this! I realised after I made the video. If you look at the top comment here by Max, it will explain how to correct :)
@@StevenBradburn Thanks, I wasn't sure if when he cites ABS that was a function.
For more than 2 variables how to find out p values of pearsons correlation at a go?
Excellent explanation. Thank you. Just one question, how I know if the two variables are actually correlating or not... what is the minimum value of correlation (r) that I need to obtain to say that the two variables are correlating?
Thank you.
Thanks Diana. So, I actually have a video that is coming out tomorrow that will cover this in more detail - I recommend you watch it. But essentially, if you want to look to see if there is a statistically significant correlation, then you need to look at the p-value. Usually if p0.7 indicates a strong positive correlation.
@@StevenBradburn Thank you so much! Looking forward to watching the next video. Have a good day.
@@dipaof1 Here you go: ua-cam.com/video/e4ApDqG6MGE/v-deo.html
I hope it helps
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when finding the t statistics there is a number error, what should i do?
Thank you but what is the conclusions ,does bmi correlates age?
So if my level of significance (alpha) was 0.05, then there is a significant positive correlation between age and BMI in my sample since p
what if our sample size is 360? do i have to use t distribution?
I got -ve t value and cannot move further to find the p as
Hi - in your other video for spearmans rs you used ABS in the formula for the t stat incase rs is negative. Is this the same case for pearsons t stat formula? how do you include abs?
Hi Nina. Yes it is also best to use here too. The ABS function just makes sure that the Pearson correlation coefficient is a positive number. Otherwise there may be an error. I forgot to add the ABS function when I made this video - doh
Can this be used for multiple variables by copying and pasting across rows?
I think if you are careful about what you are copying and pasting, then sure
When I’m calculating the p value, when some numbers are negative it keeps coming up as “NUM” and I’m unsure how to fix that. When they’re all positive numbers it works fine
Hi Chloe. So this is a slight error on my part. The process I shown cannot use negative Pearson correlation coefficient values to calculate the P value. Instead, either manually change the negative correlation value to positive or use the =ABS formula in a new cell and use the cell containing the negative value as the input.
The P value will be the same regardless of whether the same correlation value is negative or positive. So a correlation coefficient of -0.76 will give the same P value (when using the same degrees of freedom) when using a correlation coefficient of 0.76
Hello, how to do this if my age group is in groups ? Like 18-25, 26-35? Please tell
Ty sitt
What is level of significance???? Help me
How do I press the return key? It just go back from previous task.
The return key is just another name for the enter key :)
Alright. 😊
what happens if a value you input is greater than 200 (>200)?
For the samle size?
How about if coefficient is negative? T-statistics becomes negative and p-value cannot be calculated. Please help..
Hi Adi,
So this process cannot use negative Pearson correlation coefficient values to calculate the P value. Instead, either manually change the negative correlation value to positive or use the =ABS formula in a new cell and use the cell containing the negative value as the input.
The P value will be the same regardless of whether the same correlation value is negative or positive. So a correlation coefficient of -0.76 will give the same P value (when using the same degrees of freedom) when using a correlation coefficient of 0.76
@@StevenBradburn thank you so much for answering. You help me so much.. Big thanks 👍
I want to ask again please.. Is the Pearson coefficient is the same whether it's negative or positive right? But the impact is whether it related (+) or inversely related (-)?
@@adinugraha1276 the final P value will be the same. The positive or negaive correlation coefficient value relates to direction of the association between the two variables. Either a positive or negative association
@@StevenBradburn yes I think that's what I meant.. Thank you so much 👍
Why is my P-value is 1.11627E-12?
Change format from number menu in home tab
Hi i tried calculating my p-value, why is it that my p-value looks like this?
1.98561E-07
As your p value is so small, it is not being displayed in decimal places in Excel. Right click on the cell and click on Format Cell. Then choose the style as number and select the number of decimals you want to see
isnt the degrees of freedom n-1?
Hello,
For a Pearson correlation, the df is n-2. This is because there are two variables in a Pearson correlation (eg, BMI and age).
Many thanks,
Steven
2024.5.16
Why does my p value have an e-10😭😭
Use names in the equation is better way.
For some reason, it does not present the option of a one tailed or a two tailed test on excel. Instead it comes with 1. cumulative frequency.... and 2. probability density.
Edit: I clicked on T.DIST instead of TDIST.
Thanks for letting me know the solution Daniel
a thousand times thank you for this !!
watched 2023.9.23
I'm here for a Biology Paper lolz
why is my p value #NUM! 😭😭
hindi me bata bhai
Thank you