STATISTICAL TECHNIQUES AND TOOLS
SAMPLING DISTRIBUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which of the following gives the standard deviation of a sampling distribution of sample means?
|
|
/√n
|
|
|
/n
|
|
|
/(n-1)
|
|
|
/[ (√n)-1 ]
|
Explanation:
Detailed explanation-1: -The standard deviation of the sampling distribution measures how much the sample statistic varies from sample to sample. It is smaller than the standard deviation of the population by a factor of √n. → Averages are less variable than individual observations.
Detailed explanation-2: -2) “the formula for the standard deviation of the sampling distribution of the sample mean, /√n, holds approximately if the population is finite and much larger than (say, at least 20 times) the size of the sample".
There is 1 question to complete.