. It is known in a pharmacological experiment that rats fed with a particular diet over a certain period gain an weight gain of 43 gms with variance 7 gms2 . Test the hypothesis that the new diet is an improvement assuming normality?

i don't know. the other person does though.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.