If sample size is bigger in random sampling , which of the following is TRUE -
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)
It approaches maximum samples
Reduces non sampling errors
Increases the precision of the result
Decreases standard error