Suppose that iq scores have a bell shaped distribution with a mean of 98 and standard deviation of 13. using the empirical rule, what percentage of iq scores are less than 111?

Solution: 130 – 100 = 30 which is 2(15). Thus, 130 is 2 standard deviations to the right of the mean. 100 – 70 = 30 which is 2(15). Thus, 70 is 2 standard deviations to the left of the mean. Since 70 to 130 is within 2 standard deviations of the mean, we know that about 95% of the IQ scores would be between 70 and 130.

twelve to twenty-four months

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explanation:

all of the above