What is the probability that the mean price for a sample of 300 H&R Block retail customers is within $12 of the population mean (i. e. +/- 12) ? The mean preparation fee H&R Block charged retail customers in 2011 was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $45.

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,

include a picture of the drawing in order for me to

step-by-step explanation:

ion

step-by-step explanation:

ion ion ion ion ion ion ion ion ion ion ion

$450 i think. hope this ☺