9. The weights of 9 men have mean z = 175 pounds and standard deviation s = 15 pounds. What is the standard error of the mean?
(a) 58.3
(b) 15
(c) 5
(d) 1.67
(e) 1.29

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

or

69.64%

step-by-step explanation:

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1