Answer:
too far to be human
Step-by-step explanation:
in 10 mins i walk 1 mile
Point estimate for the difference between two population proportions is the difference between the two sample proportions, written as:

and the standard deviation is given by

When np and n(1-p) is greater than 5, then the sampling distribution is approximately normal and we can use standard normal methods.
Thus, the propability of a test <span>for the difference between two population proportions is given by

</span>
Answer:
I think that the answer is A.
Step-by-step explanation:
After each hour 60% ( or 0.60) of the drug will be present.
The equation is A = 100(0.6)^t where t = time in hours. (answer)
The student added 9 1/2 instead of adding -9 1/2