Answer:
(1-,3),(2,2),(3-,3),(2,1),
4 ; 32
Step-by-step explanation:
Given that :
Number of observations, n = 9
Let observations = X
ΣX = 360
The mean, (m) is calculated using the formula :
m = ΣX / n
m = 360 / 9
m = 4
Σ(X - m) = 288 (sum of square of deviation )
Variance is calculated using the formula :
[Σ(X - m) / n]
Variance = Sqrt(288 / 9)
Variance = 32
Remember: a^2 + b^2 = c^2
1
64 + 49 = 113
√113 =
2
100 - 25 = 75
square root of 75 = 5
they are not equal
13/4 hour is 3hour and 15 minutes