W1 L2: Confidence intervals

What does the area under a curve of a sampling mean distribution indicate?

The probability of the population value falling into a specific range of sampling values.

How to calculate the probability of something occurring between two points on a sampling distribution curve?

Use the population mean, standard deviation and number of samples to calculate the standard error
Use the standard error to calculate the values z-scores
Use the table to find out area – and then get the probabilities

How do you calculate the true value C, given that it will only be succeeded by — % given sample means?

Calculate the standard error
Find the corresponding area under curve between and C to determine z-value
Use z-value calculation (algebra)

What is ?

The error rate as a probability
aka

How do you calculate confidence intervals given population M, population standard dev, n and a given limit?

Find Zc for a given limit.
Use z-formula/ confidence interval formula to find population mean mark.