Answer:
So on this case the only option that satisfy the calculated statistic is:
z=-0.42
Step-by-step explanation:
Assuming this complete problem: "In a 2-sample z-test for two proportions, you find the following:
^P1 = 0.32, (n,1)=50
^P,2= 0.36, (n,2)=50
Find the test statistic you will use while executing this test:
z=-0.67
, z=±1.64
, z=-1.96
, z=0.34
, z=-0.42"
Solution to the problem
Data given and notation
sample 1 selected
sample 2 selected
represent the sample proportion for 1
represent the sample proportion for 2
z would represent the statistic (variable of interest)
represent the value for the test (variable of interest)
We need to apply a z test to compare proportions, and the statistic is given by:
(1)
Or equivalently:
(1)
Where
Calculate the statistic
Replacing in formula (1) the values obtained we got this:
So on this case the only option that satisfy the calculated statistic is:
z=-0.42
Answer:
$30.62
Step-by-step explanation:
12% of 40 is 4.8
(10% is 4, 2% is 0.8)
40- 4.8= 35.2
13% of 35.2 is 4.576
(10% is 3.52, 3% is 1.056)
35.2- 4.576= 30.624
then rounded to 2 decimal places
30.62
Answer:
$54.51
Step-by-step explanation:
an easier way to do this is simply by multiplying 47.40x115%, which is 54.51.
another way to do this is by multiplying 47.40x15%, which is 7.11, then you'll have to added to 47.4, which gives you the same answer of 54.51