How is probability used in inferential statistics? A researcher uses probability to calculate the mean value of a sample. A researcher uses probability to decide whether to draw a sample from a population. A researcher uses probability to help her decide whether she believes a treatment has had an effect.

Uestion 1(multiple choice worth 5 points) (05.02)alex wants to paint one side of his skateboard ramp with glow-in-the-dark paint, but he needs to know how much area he is painting. calculate the area of the isosceles trapezoid. isosceles trapezoid with top base 12 feet, bottom base of 18 feet, and height of 6 feet. 72 ft2 84 ft2 90 ft2 108 ft2