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Heights of ten year old boys (5th graders) follow an approximate normal distribution with mean u=55.5 inchesand standard deviation=2.7 inches: (a) According to this normal

Heights of ten year old boys (5th graders) follow an approximate normal distribution with mean u=55.5 inchesand standard deviation=2.7 inches:

(a) According to this normal distribution, what proportion of10-year-old boys are between4ft4.5in and5ft6.5in tall (between 52.5 inchesand 66.5inches)?

(b)A parent says his10-year-old son is in the98thpercentile in height. How tall is this boy? Give answer in inches

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