a. the following statement is not true? Saturday, April 15, 2017. a population has N items and n items are selected with b) Systematic sampling . In a certain stats class, the marks obtained by students on a class test followed a normal distribution with a mean of 68% and a standard deviation of 10%. In a certain stats class, the marks obtained by students on a class test followed a normal distribution with a mean of 68% and a standard deviation of 10%. … Consider a large population with a mean of 160 and a standard deviation of 40. Suppose n = 1000 persons are to be sampled from this population and the sample proportion of grandparents as primary caregivers (?-hat) is to be calculated. variance, The sampling For making Mcq Added by: Areesha Khan. A random sample of size 64 is taken from this population. 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