Table 7.1 A comparison of self-reported and meas- ured weight (lb) for 10 subjects Subject Self-reported Measured number weight weight Difference 1 120 125 234567899 120 118 135 139 118 120 120 125 190 198 do bith -5 124 128 175 176 133 131 +2 10 125 125 Epidemiology Height and weight are often used in epidemiological studies as possible predictors of disease outcomes. If the people in the study are assessed in a clinic, then heights and weights are usually measured directly. However, if the people are interviewed at home or by mail, then a person's self-reported height and weight are often used instead. Suppose we conduct a study on 10 people to test the comparability of these two methods. The data for weight are given in Table 7.1. 7.33 Should a one-sided or two-sided test be used here?