Answer:
And we can use the normal standard distribution table and we got:
Step-by-step explanation:
For this case we know the following info given:
represent the population proportion
represent the sample size selected
We want to find the following proportion:
For this case we can use the normal approximation since we have the following conditions:
i) np = 622*0.14 = 87.08>10
ii) n(1-p) = 622*(1-0.14) =534.92>10
The distribution for the sample proportion would be given by:
The mean is given by:
And the deviation:
We can use the z score formula given by:
And replacing we got:
And we can use the normal standard distribution table and we got: