Question

Asked Mar 6, 2019

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How do you find standard divination?

Step 1

*Standard deviation:*

*For sample:*

Let *x _{1,}x_{2}…x_{n}* be the population observations of size

Step 2

*For population:*

Let *x _{1,}x_{2}…x*

Step 3

*The procedure for finding population standard deviation with group data:*

*Step 1: Finding the mid points:*For the first class, (*a – b)*, the lower limit is*a*and the upper limit is*b*. For the second class (*c – d)*, the lower limit is*c*. Hence the mid-point is*,((a + c)/2).**Step 2:*For each class, the mean class will be subtracted from mid-point.*Step 3:*The difference in step 2 will be squared and will be multiplied by the frequency.*Step 4*: Add all those values obtained.*Step 5:*Find the sum of the frequencies.*Step 6:*Substitute the value from step 4 in the numerator and the value form step 6 in denominator. Take the square root of the fraction. That value the population standard deviation.*The procedure for finding sample standard deviation with group data:**Step 1*: Find the grand mean of the data.*Step 2: Finding the mid points:*For the first class, (*a – b)...*

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