Sir, i have a small doubt. In case of variance, why don't we need to multiply the square of the difference between the mean and each observation by the frequency of observation, just like we did in mean deviation? or is it simply a formula of its own?
Sir at 2:06:30 you said that after squaring the difference we multiply it with no. of observation i.e., frequency, but while calculating the variance in question at 2:21:20 , you just simply added the squares of the differences and divide it with total number of observations, why didn't you first multiply the squares with respective no. of observation and then sum and divide it with total number of observations?
Very helpful for non hindi aspirants..thank you soo much sir❤
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Sir if possible provide imp types in profit and loss
answer for homework question is 43
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Please upload co-ordinate geometry in one of the upcoming classes
Kindly upload strategy video for ssc tier 2 english
Splendid session sir❤❤❤❤. Never expected this from a gs expert.
Sir please do critical reasoning also, it helps us a lot please🙏🙏🙏🙏🙏🙏🙏
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Probability lecture needed Sir!
Yes, next week we will complete Permutation & Combination first and then probability
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Sir, i have a small doubt. In case of variance, why don't we need to multiply the square of the difference between the mean and each observation by the frequency of observation, just like we did in mean deviation? or is it simply a formula of its own?
Yes, in grouped data you have to multiply the square of difference & frequency
Sir if possible please upload critical reasoning video in english 😢
Will think about it
1.5❤
Sir at 2:06:30 you said that after squaring the difference we multiply it with no. of observation i.e., frequency, but while calculating the variance in question at 2:21:20 , you just simply added the squares of the differences and divide it with total number of observations, why didn't you first multiply the squares with respective no. of observation and then sum and divide it with total number of observations?
Yes, you are right... that step has been missed in that question
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Is the answer to the last question is 02.06?
Either it's a typing mistake or you need to solve it again