Notation Listed below are body temperatures from five different subjects measured at 8 AM and again at 12 AM (from Data Set 2 "Body Temperatures").

Only find d-bar

Temperature (F) at 8 AM	97.8	99.0	97.4	97.4	97.5
Temperature (F) at 12 AM	98.6	99.5	97.5	97.3	97.6

6. Heights of Presidents A popular theory is that presidential candidates have an advantage if they are taller than their main opponents. Listed below are heights (cm) of presidents along with the heights of their main opponents.

Height (cm) of President	185	178	175	183	193	173
Height (cm) of Main Opponent	171	180	173	175	188	178

For this question do the following:

a. Identify the null and alternative hypotheses

b. Calculate the test statistic. (Note: standard deviation of the differences = 6.89)