Respuesta :
A poll worker analyzing the ages of voters found that μ = 65 and σ = 5. The possible voter age that would give her zx = 1.14 is 71.
What do you mean by standard deviation?
In statistics, Standard deviation is a measure of the variation of a set of values.
σ = standard deviation of a population
N = number of observations of population
X = mean
μ = population mean
It is given that the random variable,
X = The ages of voters
μ = The analysis is having mean of 65
Standard deviation = 5
X = normal (65,5) Now, we will convert it into Z-score concept ,
Z = x - 65/ 5
z = 1.14
X = 65 + 5z
So, X = 65 + 5(1.14)
= 65 + 5.7
= 70.70
Therefore, We can also write it by rounding off the value,i.e.=71
The possible voter age that would give her zx = 1.14 is 71.
Learn more about standard deviation
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