Question 195278
Population mean= 23.9422 and a population standard deviation= 4.3977

Sample Data:
26 26 28 22 31 22 26 22 28 28 28 17 16 21 29 18 35 25 25 28

Find:
Mean Median Mode Midrange Varance Standard Deviation P80 D3

i have found Mean Median Mode and Midrange but am having trouble solving for  V
Standard Deviation = 0.3233...
Variance = 0,3233^2 = 0.1045
P80 = ?
Locator : 0.8*20 = 16th number ; that data element is 28
D3= = P30
Locator : 0.3*20 = 6th number ; tat data element is 22
Can you please help me?
================================================
Cheers,
Stan H.