Step-by-step explanation:




Option C
The confidence interval would be (0.122, 0.278).
We first find our z-score. We want a 95% confidence interval:
0.95/2 = 0.475
Looking this up in the z-table, (http://www.statisticshowto.com/tables/z-table/) we see the z-score is 1.96.
The formula we will use is:

In this problem, p = 20/100 = 0.2, and n=100:
C is the answer. Hope that helps C:lol
3/8 = 9 blueberry muffins so 15 (or 5/8) of the muffins should be strawberry if that's the only other kind of muffins in this equation.