Assumptions of Z-test
The population must be normally distributed with a known variance or standard deviation
Sample must be random
What’s the HO and H1 in Z-Test
Mew line with U
How do you find Test Stat in z test
Put the data into menu 6 1
How do you draw and find the critical region of z test
A bell curve
Go into inverse normal and put the significance level as area and put in the mean and variance in
Assumptions of proportional test
The population follows a binomial distribution
The sample is random
What’s the H0 and H1 for proportional test
pi > percentage in question
pi < percentage in question
pi = =\ percentage in question
How do you find the test stat in Proportional test
Will say in question
How do you find critical region in proportional test
B( x, y )
X = a number given in the question
Y = the percentage used in H0 and H1
How do you do a normal approximation test
The same as proportion test but when it comes to at 5 % level using :
Put the normal B( x, y )
And then N ( NxP, NXP - (1-p)