In a 2-sample z-test for two proportions, you find the following: sub(hat(p),1)

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

about 0.75 hours

step-by-step explanation: