Which of these is taken as the sample size while estimating process standard deviation, where sample size is variable?

ni; Which is the highest among all sample sizes

ni; Which is the lowest among all sample sizes

ni; Which is the most frequently occurring among all the sample sizes

Which of these is taken as the sample size while estimating process st

1.	Which of these is taken as the sample size while estimating process standard deviation, where sample size is variable?
A.	n<sub>i</sub>; Which is the highest among all sample sizes
B.	n<sub>i</sub>; Which is the lowest among all sample sizes
C.	n<sub>i</sub>=5
D.	n<sub>i</sub>; Which is the most frequently occurring among all the sample sizes
Answer» E.