Sampling Distribution

Question 1

p symbol

Answer 1

overall population

Question 2

p hat symbol

Answer 2

actual porportion

Question 3

How do you make a skewed graph more normal?

Answer 3

Have a larger sample size

Question 4

Central Limit Theorem

Answer 4

A random sample size taken from a population w/ true proportion, the sampling distribution will tend to follow a normal distribution in regards to mean & SD
- ONLY when np > 10 & n(1-p) > 10 & observations are independent
–> usually will use p hat instead of p bc usually will not have the population distribution

Question 5

When does variance inc & dec in relation to p hat?

Answer 5

If (1-p hat) is larger than current p hat, variance inc.
If (1-p hat) is smaller than current p hat, variance would decrease