Sppose the average annual rainfall for the local area was previously known to be 8 inches. A local meteorologist believes there was above average rainfall from 1997 thru 2001 and argues that the average annual rainfall during this period was significantly different from the overall average annual rainfall of 8 inches. The average annual rainfall recorded from 1997 thru 2001 are given below. S= 1.30, Sample Mean= 6.2, N = 5  What can you conclude?, show step by step procedure

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?