questing help me with these questions thank you so much Solu

questing

help me with these questions ..thank you so much ..

Solution

2)
sample B has more variability has it has wide range

b)

sample A

mean = 7+9+10+8+9+12/6 =9.17

variance = [(7-9.17)^2 + (9-9.17)^2 + (10-9.17)^2 + (8-9.17)^2 + (9-9.17)^2 + (12-9.17)^2 ] /6

= 2.472233

standard deviation = sqrt(variance) = 1.5723

sample B

mean = 13 + 5 + 9 + 1 + 17 + 9 / 6 = 9

variance = [ (13-9)^2 + (5-9)^2 + (9-9)^2 + (1-9)^2 + (17-9)^2 + (9-9)^2 ] / 6

= 26.6666667

standard deviation = 5.164

c)

sample A mean is more representative as all the values are nearby mean

standard deviation is the average deviation of value from mean