STEM - Standard ErrorWatch
How would I work this out?
A population is normal with mean 20 and standard deviation 5.
A random sample of size 10 is taken:
- What is the standard error (STEM) of ?
- How many standard errors (STEMs) away is 28 from the mean?
- Using normal distribution tables, what is Pr( ≥ 28 )? (We can use normal tables because the sampling distribution of the mean (i.e. how the sample means are distributed) is a normal distribution if the population has a normal distribution)
I'm so confused
Big love to whoever can help me
- Study Helper
http://mathworld.wolfram.com/NormalDistribution.html for more info click that link - I've got no clue what it means but it might help (and it looked the least confusing)