Sampling Error and confidence intervals
10 important questions on Sampling Error and confidence intervals
Why is precise information about the variation in values of M due to sampling error important?
What is a prediction Error?
When does the population standard error (Qm) increase?
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Why would we like to have a small value of the population standard error (Qm)?
What will happen to the standard deviation of the mean (Qm) when other factors being equal, as N increases
What is the beste way to decrease the standard deviation of the population mean (Qm)?
Difference between normal distribution and a t distribution
Which 3 steps do you need for reading t distribution table?
2 find degrees of freedom of sample (N-1)
3. Locate the cell in the row and collum
When other factors are equal other factors make confidence intervals wider, which factors are they?
How to interpret a confidence interval
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