If 40 people were surveyed then it is reasonable
Well i atleast know its not 10 lol
We want the integral of the standard normal from -z to z to be 0.85. Let's look at some standard normal tables and pick the right one.
It's easy to find the Erf one, which is the integral of the unit normal from 0 to z. That will be exactly half of the integral from -z to z. So we look for the z value corresponding to a probability of 0.425 in that table and find
z = 1.44
Answer: 1.44
[figure from Wikipedia]
Answer:
The answer would be 36.
Step-by-step explanation:
3x3x9 is 36ft.
The difference (adult - teenager) in the sample proportions of those who would recommend this action movie varies about 0.091 from the true difference in proportions.