Hello and thank you very much for the information in the video. Would it be correct to say that, in probit analyses, it is not correct to use mortality percentages of 0% and 100% due to the transformation to percentages to probit (Finney´s Table)? regards
@@dianakemunto2016 yewp. % Death = [(no. of dead nauplii) / (no. of dead nauplii + no. of active nauplii)] x 100 After getting the percent death, you should use this . . . Corrected Formulas for Mortality: 0% dead = 100(0.25/n) 100% dead = 100(n-0.25/n) /Sorry tho, I forgot my reference for this :(( it's been a year already and I can't find the copy of my research paper here in my phone. Anywayz, hope you'd do well! :>/
sorry, for this very late reply... I just opened this video today.... it doesn't matter what letter is used - the constant (without the x) is the "Intercept" in the Regression output., and the other number is the coefficient of x, (x is the independent variable)
Student here, searching for their statistical treatment for research capstone hehez, I want to ask if it would be the same process and formula when it comes to the dosage of the substance instead of the concentration. We are going to research the efficacy of our pesticide, what would you suggest for the testing?
Hi there. Thanks for the video. Did you have more than one replicate per concentration in this scenario? Did you pool the number of dead organisms , so thats why you have only one collumn for "% dead"? Thank you in advance for your reply.
I am confuse when i compare to others explanation, it was not simple like this,.. they have emperical probits, expected probits, working probit, and else....
Dear Jan. In my experiement I have result for deaths %100 and %0 also but there is no value in the table that you show.. So how can I show %100 and %0 deaths in probit? Could you help me pls?! Thx
@@jenniferpaltiyan-bugtong8680 yes i did exactly what you did in the video. But x value is negative. So antilog x or LC50 value is not present among my concentrations.
@@naimaali5886 so i got the answer and used it for my paper, 0% dead= 100(0.25/n) 100% dead= 100(n-0.25/n) These formulas are to find the corrected values of 0 and 100 mortality rate.
you saved our thesis. thank you for this!
You saved the day..
The perfect video we wanted
Very useful video for understanding the analysis in excel
Hard work is the real way of success!! Courage kuri josiane.
Would this also apply if i use this to calculate the lt50?
Hello and thank you very much for the information in the video. Would it be correct to say that, in probit analyses, it is not correct to use mortality percentages of 0% and 100% due to the transformation to percentages to probit (Finney´s Table)? regards
Thank you very much for your video lecture. I have acquired basic knowledge and skills to perform my assignment.
A big thanks. Your very informative video solved my problem. Loves
Excellent explanation...!!!!!!!!!
Very good video, probit.
Amazing
Wonderful refresher .Thank you so much!
self-explanatory video. really helpful. just one question, what would be the probit value if the percent mortality is 100 %
Thank you for this wonderful guide
Thank you for the video Jennifer
Hello may I know if there is a multiple concentrations and multiple treatments. Do you have video tuts for that?
Very good video bro
thank you sir
Hi sir! I am sorry but I can not find any probit transformation table with a 100% mortality rate.
this helped me a lot. thank you.
Also tell can we take ppm directly or do we have to convert it into concentration first
It's very useful...thq..
at what point should you test normality ?
What is the formula for percentage death?
Hey, did you get an answer to this please?
@@dianakemunto2016 yewp.
% Death = [(no. of dead nauplii) / (no. of dead nauplii + no. of active nauplii)] x 100
After getting the percent death, you should use this . . .
Corrected Formulas for Mortality:
0% dead = 100(0.25/n)
100% dead = 100(n-0.25/n)
/Sorry tho, I forgot my reference for this :(( it's been a year already and I can't find the copy of my research paper here in my phone. Anywayz, hope you'd do well! :>/
Thank you very very very much. It has helped a lot!
@@chiken8801 Hello I just want to ask what is the purpose of correcting the mortality
@@yyizzhuo that's for 0% and 100% mortality to get the exact percentage in the table of toxicity.
really great job
Thanks! Very simple and rápid to do!!
Thank you for the help!
Awesome video!!!
Really helpful.. Thanks a lot..
Glad to know that.
Excellent video! Thank you so much! Is it possible to calculate 95% confidence intervals? Thanks
up
Final answer of LC 50 will come in ppm or mg/l
Plz reply
would this change if I want to calculate IC50?
Nice, Thanks!
One quick question, how do you convert your % of mortality in probits with the table if you have 0% mortality or 100% ??
Hey there, for 0% use the formula 100(0.25/n) and for 100% use the formula 100[ (n-0.25)/n] Reference: Miller and Tainter Method of Probit analysis
Thank you very much. It was helpful
This is awesome. Thank you so much
Thank you very much. This was very helpful
Thanks for the informative video... How to calculate LC90%. Can you please help me out mam???
Thank you so much, It was really useful !!
Hi sir, I need your help. I haven't "date analysis" in my EXCEL, so I can't calculate LC50. This was so useful! for us. Thanks.
I did it using MS Excel
Thanks a lot for this video.
what if x is negative value???
Thanks, Its Very helpful
Thank you so much!!
thank you for your video, its very helpful :)
thanks for this video ... how to have NORM.S.INV function , doesn't appear in my menu
what if my quation resgression is Y=4.79- 0.0000785x? I got result x= 0 advice please.
Thanks. How did you calculate percentage dead
(number of dead/total number of samples) x 100%
how does this apply to more than 3 replicates per concentration?
THANKS A LOT
how do i calculate LT50 using microsoft excel
Sir, Excel sheet is not visible.
Kindly tell me unit of LC50, which you calculates. Thanking you
thx for video. btw why use y=ax+b? bcs in some literature it must y=a+bx. thankkss
sorry, for this very late reply... I just opened this video today.... it doesn't matter what letter is used - the constant (without the x) is the "Intercept" in the Regression output., and the other number is the coefficient of x, (x is the independent variable)
Student here, searching for their statistical treatment for research capstone hehez, I want to ask if it would be the same process and formula when it comes to the dosage of the substance instead of the concentration.
We are going to research the efficacy of our pesticide, what would you suggest for the testing?
Eyyy same. Did your paper turn out good? Also what was the pesticide made of and what insect was it for if I may ask? :D
Thanks bro.....
This is awesome! Thank You a lot for this explanaition. Can You make similar movie about mortality 100? Is it possible?
Thank you sir. I'll see if I can possibly make one.
I'm a girl :D
oh, I'm sorry.
please what is the theoretical reference for this method?
What was that table that you use for getting the probit? Is it standard values.? Or I have to calculate those values myself..
Hi there. Thanks for the video. Did you have more than one replicate per concentration in this scenario? Did you pool the number of dead organisms , so thats why you have only one collumn for "% dead"? Thank you in advance for your reply.
same question here
Good question. As far as I am concerned you would use the average mortality (I do triplicates).
hi! does it work the same even if ppm isn't the unit of concentration used?
I know this question could sound stupid, but why there at the end of my experiments I have all my samples dead, so why there is no 100%?
for 100% use the formula 100[ (n-0.25)/n]
Reference: Miller and Tainter Method of Probit analysis
I am confuse when i compare to others explanation, it was not simple like this,.. they have emperical probits, expected probits, working probit, and else....
Dear Jan. In my experiement I have result for deaths %100 and %0 also but there is no value in the table that you show.. So how can I show %100 and %0 deaths in probit? Could you help me pls?! Thx
Hello Emre, you need to identify the correction values using these formulas:
For 0%: 100(0.25/n)
For 100%: 100[(n-0.25)/n]
@@jenniferpaltiyan-bugtong8680 n be the number of deaths???
@@jenniferpaltiyan-bugtong8680 hello, can i get the reference for this formula plss
Thank you so much
Thankyou so much....
Table STOX_2013...references???
should i put it in an absolute value or keep it negative ?
your data have negative values?
@@jenniferpaltiyan-bugtong8680 no but the mortality decreases with the increase of concentration.
@@cosette8979 you should enter the actual number of mortality per concentration not the increase or decrease in number of mortality
@@jenniferpaltiyan-bugtong8680 yes i did exactly what you did in the video. But x value is negative. So antilog x or LC50 value is not present among my concentrations.
@@cosette8979 If you may, please send your data to me so I could check it out (jpaltiyan01@gmail.com). Kindly subscribe to my channel. Thanks
Thanks you so much
helpful
THANKS
mention the version of microsoft i have to use to do this calculation?? plz reply ASAP
similar with me no menu data analysis on my excel,even i was tried to find at customize menu.
Please, could you uploading this video as a pdf? Many thanks
Hello po. Pwede po ba kami mag pa compute?
👍
Hello, please anyone can answer my question. 😊 So here it is, to calculate 0 and 100% Mortality, necessay corrections have to be done prior to probit?
i'm looking for an answer to this, we have the same question. . ..
It seems no one has this answer, please if you find it share it with me .
@@naimaali5886 so i got the answer and used it for my paper,
0% dead= 100(0.25/n)
100% dead= 100(n-0.25/n)
These formulas are to find the corrected values of 0 and 100 mortality rate.
Thank you so much
@@chiken8801 what is the value of n?
Please, you can give me references?
Sir help me to reset my password in probit account I have forget my password
Nothing easy but all possible "impossible is nothing"
Thank you very much!
Kindly tell me unit of LC50, which you calculates. Thanking you
Thank you so much