Heights of ten year old boys (5th graders) follow an approximate normal distribution with mean inches and standard deviation
inches.1

(a) According to this normal distribution, what proportion of 10-year-old boys are between 4 ft 3.5 in and 5 ft 0.5 in tall (between 51.5 inches and 60.5 inches)?
Proportion:

(b) A parent says his 10-year-old son is in the
th
percentile in height. How tall is this boy?

Round your answer to two decimal places.

Height:

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1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)