### Calculation of a population standard deviation

With p= 80, x= 86and corresponds to z= + 2.00, what is the population standard deviation? If you have a score of x= 65 on an exam, which set of parameters would give you the best grade on the exam? - u= 60 and o= 5 - u=70 and o= 10 - u= 60 and o= 10 - u= 70 and o= 5 If you have a population of u= 50 what value would m