Find two different ways to state that two population means are equal for a null hypothesis in a 2-sample z-test.

Question 1 options:

	H0: 1=a ; H0: 1 = b
	H0: 1 = 2 ; H0: 1 2
	H0: 1 = 7; H0: 1 7
	H0: 1 = 2 ; H0: 1 - 2 =0

Question 2

A type I error occurs when the:

options:

	test is biased
	null hypothesis is incorrectly rejected when it is true
	null hypothesis is incorrectly accepted when it is false
	sample mean differs from the population mean

Question 3

Which of the following symbols represent a confidence level?

options:

	(1-)*100%
	1-