The standard deviation for a set of data is 7.5. The mean is 235. What is the margin of error?
2 answers:
The margin of error is 0.97849
we are given
mean=235
so,

standard deviation =7.5
so,

we know that
ME=2*standard error
and

If confidence level is 95%, then we can multiply by 1.96
so, we can multiply by 2 to get ME
now, we can use marginal error formula

now, we can plug values
and we get


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