# statistics

Suppose that IQ scores have a bell-shaped distribution with a mean of 95
95
and a standard deviation of 18
18
. Using the empirical rule, what percentage of IQ scores are at least 149
149

1. 👍 1
2. 👎 0
3. 👁 1,218
1. 149 - 95 = 54 ... 54 / 18 = 3

what percentage of values is at least 3 standard deviations above the mean?

1. 👍 0
2. 👎 0

1. 👍 0
2. 👎 2

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