Me ! farmer james has three types of cows on his farm. a cow with zero legs is called a ground beef, a cow with one leg is called a steak, and a cow with two legs is called a lean beef. farmer james counts a total of 20 cows and 18 legs on his farm. how many more ground beefs than lean beefs does farmer james have ?

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95