Question

Assume that a 21-year old men's heart rates at rest are normally distributed with a mean of 71 beats per minute and a standard deviation of 6 beats per minute. If 200 men are examined, how many would you expect to have a heart rate of less then 74?

Answer 1

is it (200-71)/(6)?

Answer 2

it comes out to be 21.5 and it says to type a whole number.

Answer 3

anyone? :/

Answer 4

x ̅=(∑x)/n

x ̅=(∑(x∙f) )/n

s=√((∑(x-x ̅ )^2 )/((n-1) ))

z=(x-μ)/σ

Answer 5

idk what one lmao!