For a population with u = 50 and σ = 5; if a sample size of 30 is selected, the sample mean is 50 while the sample standard deviation is 0.91
What is z score?
The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:
z = (raw score - mean)/standard deviation
For a population with u = 50 and σ = 5; if a sample size of 30 is selected:
Sample mean = 50
Sample standard deviation = 5/√30 = 0.91
For a population with u = 50 and σ = 5; if a sample size of 30 is selected, the sample mean is 50 while the sample standard deviation is 0.91
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