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HowardWolowitz
 one year ago
Mean and Standard deviation question!
HowardWolowitz
 one year ago
Mean and Standard deviation question!

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hartnn
 one year ago
Best ResponseYou've already chosen the best response.1you know the formulas, right?

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0No not for this

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0um what is the formula called?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1mean is just the average, sum all the values and divide by the number of values. first find mean, you'll need it for std deviation

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1std deviation is the square root of variance and variance is \(\Large {Var}(X) = \frac{1}{n} \sum \limits_{i=1}^n (x_i  \mu)^2. \)

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0problem, Im not sure where to put some of the values

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1\(\Large \mu = \dfrac{1.13+1.02+1.23+1.06+1.16}{5}\)

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0it is linear so 1.12u

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1yes, thats mean now calculate variance using the formula

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1\(mean = \mu = 1.12\) \(\Large {Var}(X) = \dfrac{1}{n} \sum \limits_{i=1}^n (x_i  \mu)^2 \\ \Large = \dfrac{1}{5} [(1.13  1.12)^2+(1.02  1.12)^2 \\ \Large +(1.23  1.12)^2+(1.06  1.12)^2 +(1.16  1.12)^2] \)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1calculating that has nothing to do with statistics you can use calculator or web to do that calculation for you

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0ok this time i got 0.00685

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1see the example here, https://www.easycalculation.com/statistics/standarddeviation.php

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0Question: is standard deviation and variance considered the same thing? or do I find it now?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1they are conceptually different, but one formula to find variance, and square root of variance is std deviation

HowardWolowitz
 one year ago
Best ResponseYou've already chosen the best response.0Now, my last question is basically asking if mean and median are or are not conflicting between which is the central value.. right?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1When the values of items in the data set are not important BUT the measure which divides the distribution into two equal parts is required, Median is considered as the measure of central tendency otherwise Mean is considered
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