Respuesta :
Answer:
8
Step-by-step explanation:
the one that the number has are the same is the data
The standard deviation of the data set is 1.6
What is Standard Deviation?
The standard deviation is a measure of the amount of variation or dispersion of a set of values.
Here, given data
data(x) frequency(f) xf d² = (x-mean)² fd²
6 2 12 4 8
8 3 24 0 0
9 1 9 1 1
11 1 11 9 9
mean = ∑xf / ∑f
= (12+24+9+11)/(2+3+1+1)
= 56 / 7
mean = 8
Variance = ∑fd²/∑f
= 18 / 7
= 2.57
Standard Deviation = √variance
= √2.57
= 1.6
Thus, the standard deviation of the data set is 1.6
Learn more about Standard deviation from:
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