80,81,84, 91, 99, 50, 93, 100-standard deviation?

I need steps on how to find this idk how to.

Question

80,81,84, 91, 99, 50, 93, 100-standard deviation?

I need steps on how to find this idk how to.

amistre64 · Answer

first step is to get the mean

amistre64 · Answer

after that, subtract the mean from all the data points

amistre64 · Answer

square the results and add em up is next

amistre64 · Answer

after that, you would have to know if this is a sample, or a population;

if sample then divide by n-1, where n is how many datapoints there are

if its a population, then divide it by "n" instead

amistre64 · Answer

all that gets you to variance

and standard deviation is just the squareroot of variance

anonymous · Answer

Thank you soo much!

amistre64 · Answer

youre welcome, its a bit of work to do ... but those are the steps :)