Now suppose you collected a sample of n=50 adults who recently underwent heart surgery. If the sample mean SGOT level you got was above 20 units/L, do you think that the SGOT level of people who have recently undergone heart surgery is actually a mean of 18.7units/L? Why/why not?

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Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500