Peter would like to select a sample from a large Which sample size would give Peter the least amount population that is normally distributed with a mean of 50 of variability in the sampling distribution of the sample
and a standard deviation of 22.

Which sample size would give Peter the least amount of variability in the sampling distribution of the sample mean?

A. 5
B.10
C.30
D. 50

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

step-by-step explanation: s