Suppose a simple random sample of size nequals45 is obtained from a population with muequals64 and sigmaequals14. (a) what must be true regarding the distribution of the population in order to use the normal model to compute probabilities regarding the sample mean? assuming the normal model can be used, describe the sampling distribution x overbar. (b) assuming the normal model can be used, determine p(x overbarless than68.1). (c) assuming the normal model can be used, determine p(x overbargreater than or equals66.3).

Which expression is equivalent to 4 square root 6 divided by 3 root 2

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?