Calculate for the mean/ average of the given numbers:
μ = (1 + 2 + 3 + 4 + 5) / 5 = 3
Then, we calculate for the summation of the squares of differences of these numbers from the mean, S
S = (1 - 3)² + (2 - 3)² + (3 - 3)² + (4 - 3)² + (5 - 3)²
S = 10
Divide this summation by the number of items and take the square root of the result to get the standard deviation.
SD = sqrt (10 / 5) = sqrt 2
SD = 1.41
Thus, the standard deviation of the given is equal to 1.41.
Answer:
I think it is 17 ft.
Step-by-step explanation:
2 mweweres and 25 cents worth of educational experience
Consider a set M, and an operation *.
Let a and b be in M, then M is closed under operation * if :
a*b, and b*a produce an element of M
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The set of negative numbers (set M) is not closed under subtraction (the operation *).
Consider 2 numbers a=-9 and b=-6 which certainly are in M.
-9*(-6) = -9-(-6)=-9+6=-3 ∈ M (note that * is the regular subtraction -)
(-6)*(-9)=-6-(-9)=-6+9=3 ∉ M
<span>In other words how can I decrease or increase a percentage using one step</span>