Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate).

a. The population size is infinite (to 2 decimals).

b. The population size is N = 50,000 (to 2 decimals).

c. The population size is N = 5000 (to 2 decimals).

d. The population size is N = 500 (to 2 decimals).

7 answers

10/ √(50) = 1.4142

b. The population size is N = 50,000 (to 2 decimals).
1.4142 √ [ (N-1)/(N-n)]
(1.4142)√ [49,999/ 49,950] ) =1.41

c. The population size is N = 5000 (to 2 decimals).
1.4142 √ ( 4999/4950) ) = 1.42
d. The population size is N = 500 (to 2 decimals).
1.4142 √ ( 499/450) = 1.49
only be is right! the other parts are wrong
part c is completely wrong
part b and c are right but d is completely wrong
part a &b are corrects the other are wrong
part a &d are corrects the other are wrong
All 1.41 except for part d