STAT FINAL EXAM

1. If n=15 and p=0.4, then the standard deviation of the binomial distribution is 3.6. (Ch6)(Points : 8)

Question 2.2. If the level of confidence and sample size remain the same, a confidence interval for a population proportion p will be narrower when p(1-p) is larger than when it is smaller. (Ch9)
(Points : 8)

Question 3.3. In a simple linear regression model, the coefficient of determination not only indicates the strength of the relationship between independent and dependent variable, but also shows whether the relationship is positive or negative. (Ch13) (Points : 8)