Refer to the peak flow data of Exercise 12.3.10. Assume that the linear model is applicable. (a)

Question:

Refer to the peak flow data of Exercise 12.3.10. Assume that the linear model is applicable.
(a) lest the null hypothesis of no relationship against the alternative that peak flow is related to height. Use a non directional alternative with a = 0.10.
(b) Repeat the test from part (a), but this time use the directional alternative that peak flow tends to increase with height. Again let a = 0.10.