If the foot length of women follows a normal distribution with a mean of 23 cm, and
81.5% have a foot length between 20 cm and 29 cm, what is your estimate of the standard
deviation of the heights in this population?

a

b

d

step-by-step explanation:

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm

the answer is b.6

step-by-step explanation: