Question

Adult IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the Empirical Rule to find the percentage of adults with scores between 55 and 145.
1)
100%
2)
99.7%
3)
95%
4)
68%

Answer 1

1) 100%

Answer 2

@jbell0385 is it correct

Answer 3

thanks

Answer 4

close... it's 99.7

Answer 5

I know, it's sort of a trick question.

Answer 6

oh i see haha that was close

Answer 7

In statistics, 99.7% of data lies within 3 standard deviations from the mean. that means 15*3 = 45

Answer 8

55 and 145 is exactly 3 standard deviations.

Answer 9

which statistically they say 99.7% of the data lies in that range. they should just round it to 100% right? =)

Answer 10

yeah they should lol