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Leviafan [203]
3 years ago
8

The standard deviation for a set of data is 7.5. The mean is 235. What is the margin of error?

Mathematics
2 answers:
blondinia [14]3 years ago
7 0

The margin of error is 0.97849

we are given

mean=235

so,

n=235

standard deviation =7.5

so,

\sigma=7.5

we know that

ME=2*standard error

and

SE=\frac{\sigma }{\sqrt{n} }

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

ME=\frac{2\sigma }{\sqrt{n} }

now, we can plug values

and we get

ME=\frac{2\times 7.5 }{\sqrt{235} }

ME=0.97849

oksian1 [2.3K]3 years ago
7 0

Answer:

The correct answer is 15

Step-by-step explanation:

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