In the study of Exercise 4, where the sample regression was based on twenty-five observa- tions, the estimated standard errors were S189 -565 -.243

(a) Test against the appropriate one-sided alterative the null hypothesis that, all else be- ing equal, hours of exercise do not linearly influence weight gain.

(b) Test against the appropriate one-sided alternative the null hypothesis that, all else be- ing equal, beer consumption does not linearly influence weight gain.

(c) Find 90%, 95%, and 99% confidence intervals for B-