Suppose that iq scores have a bell-shaped distribution with a mean of 103 103 and a standard deviation of 14 14 . using the empirical rule, what percentage of iq scores are less than 145 145 ? do not round your answer.

145 is 3 standard deviations above 103, since the difference, 42, is 3 times 14.

The rule I suppose is 68-95-99.7 the last number meaning 99.7% of the area of the Gaussian is between -3 and +3 standard deviations.

That's 0.3% leftover, 0.15% in each tail so

99.85%

of the scores are (expected to be) less than 145.

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

the aswere is the one with all 8's and the second one is with the 10,8 and 6

step-by-step explanation: