One Proportion Z Tests/Intervals + Type Errors

What is the 1PropZInt Formula?

What is the value of P?

The probability of getting P (or worse) if the null hypothesis is true

When are binomials normal?

If np and nq are greater than or equal to 10

What is the Central Limit Theorem?

A big random sample will be approximately normal

What conditions are needed for a 1-PropZTest?

1. Random 1. “Stated”

2. np and nq >/ 10

3. N > 10n

What conditions are needed for a 1-PropZInterval?

1. Random 1. “Stated”

2. np and nq >/ 10

What formula is used for choosing a sample size?

n = (z/m)² p(hat)q(hat)

If you don’t know p(hat) and q(hat), what number do you use?

(0.5)(0.5)

What is a Type 1 Error?

Reject the Ho when the Ho is actually true

What is a Type 2 Error?

Fail to Reject the Ho when the Ho was false