If sample size is bigger in random sampling , which of the following is TRUE -
It approaches maximum samples
Reduces non sampling errors
Increases the precision of the result
Decreases standard error
Ans. is 'd' i.e., Decreased standard error Also Know: o Greater the standard detion (a), greater will be the standard error (SE), especially in small samples o SE can be minimized by reducing SD: By taking a large sample o SE is measure of variability of sample summaries: SE. is the SD of sample means Uses of standard error of mean (SE.) in large samples: i) To work out limits of desired confidence within which population mean would lie. ii) To determine if sample is drawn from a known population or not iii) To find SE of difference between 2 means (to know if difference is real and statistically significant) iv) To calculate sample size (within desired confidence limits)