Is an estimate of the common population variance σ2. it provides a estimate of σ2 when h0 is true, and tends to become when ha is true. is an estimate of the common population variance σ2. it provides a estimate of σ2 regardless of whether h0 is true or not.

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.