L7

Question 1

How do you calculate the likelihood of getting a normally distributed discrete random variable of a certain value

Answer 1

You convert the value to a z score and look up the likelihood in a table

Question 2

When is a sample proportion approximately normally distributed

Answer 2

When np >= 5 and n(1-p) is also greater than five

Question 3

When is there beed for a finite population correction factor

Answer 3

When the sample is at least 5% of the population

Question 4

What is a statistic

Answer 4

A random variable whose value depends on the sample