I'm currently revising for a quants exam and I'm stuck on some stats stuff, specifically chebyshevs theorem.
So the question is: Suppose that IQ scores have a mean of 100 and a standard deviation of 15, use Chebyshev’s theorem to calculate the percentage of people that have an IQ score between 70 and 130.
So far I have
(1-1/k^2)
(1-1/15^2)
(1-1/225)
1-0.00444444
0.995
So 99.5% of Iq scores fall between 70 - 130. Can anyone tell me if this is correct? And if not where I'm going wrong.
Thanks
So the question is: Suppose that IQ scores have a mean of 100 and a standard deviation of 15, use Chebyshev’s theorem to calculate the percentage of people that have an IQ score between 70 and 130.
So far I have
(1-1/k^2)
(1-1/15^2)
(1-1/225)
1-0.00444444
0.995
So 99.5% of Iq scores fall between 70 - 130. Can anyone tell me if this is correct? And if not where I'm going wrong.
Thanks