Question 1058659
Question ambiguous.  The probability that should be used is 20%.
0.12 smoke
the standard error at the 95% level has an interval that is 1.96*sqrt(0.2*0.8/50); that sqrt is 0.0565; the product is 0.1109
The confidence interval is (0.0091, 0.2309)
Since 0.20 is in the 95% interval we cannot conclude that statistics students smoke at a different percentage than do other adults.
The p-value for this result is 0.16