A variable * follows a normal distribution with mean 43 and variance 14 4 . We take a random sample of ~ individuals from this distribution and calculate the sample mean *c . What must the sample size be so that the standard deviation of the sample mean * is equal to 0. 8 ?` ( A ) 15 ( B ) 64 ( C ) 120 ( D ) 180 ( } ) 225 The number of undergraduate students at the University of Winnipeg is approximately