Exercise 8.3 (Algo) METHODS AND APPLICATIONS Suppose that we will take a random sample of size , from a population having mean , and standard deviation o For each of the following situations, find the mean, variance, and standard deviation of the sampling distribution of the sample mean > : (a) = 20. 0= 4. n= 32 (Round your answers of "o : " and "g : 2" to 4 decimal places.) OX 2 (b) = 557, 0= .5, n= 138 (Round your answers of "g : " and "o ; 2" to 4 decimal places.) OX*2 (c) u = 7, 0= 1. n= 6 (Round your answers of "g , " and "g ; 2" to 4 decimal places.) OX (d) = 86, 0= 8, n= 1,611 (Round your answers of "a : " and "o ; 2" to 4 decimal places.) ox*2