It is claimed that in a bushel of peaches less than ten percent are defective. a sample of 400 peaches is examined and 50 are found to be defective. what is the alternate hypothesis for a one-sided test

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?