WEEK 5 Flashcards
1
Q
Ts formula
A
x mean 1 - x mean 2 / SE
TAKE MEAN OF ALL DIFFERENCED
S of the difference
2
Q
for normal distribution we have
A
normal standard deviation (z table) large sample
3
Q
t distribution is when u know population
A
sample s for standard deviation
4
Q
2 tailed hypothesis
A
Ho = mean = meano
H1 = mean = (not equal) meano
5
Q
1 tailed hypothesis
A
Ho = mean = meano
H1 = MEAN > meano
6
Q
always assume %
A
5% critical value if not mentioned
7
Q
z test
A
large sample, normal distribution n>30
8
Q
t test
A
small size usually t distribution n<30
9
Q
2 tailed
A
not mentioned which one
10
Q
one tailed test
A
improved, more or less effective upper or Lower bounds
