Question

If u= 70% and o=5%, what % of scores fall within 3 standard deviations from the mean?

Answer 1

"85%" is the right answer.

Explanation:

Given:

`\mu = 70` (%)

`\sigma = 5` (%)

As we know,

The 99.7% observation fall within the 3rd standard deviation, then

⇒
`(\mu \pm \sigma ) = (70-(3* 5)) \ to \ (70+(3* 5))`

`=(70-15) \ to \ (70+15)`

`=55 \ to \ 85` (%)

Thus the above is the correct solution.