Aug weight November weight weight diff Aug BFI Nov BF BFI diff
113.2 113.4 0.2 20.7 19.4 -1.3
116.6 116.4 -0.2 21.5 23.2 1.7
128.4 127.6 -0.8 23.4 25.4 2
128.6 129.8 1.2 10 11.1 1.1
132 134.8 2.8 11.2 11.5 0.3
138.6 137.8 -0.8 12.7 11.1 -1.6
139 140.8 1.8 12.7 141 128.3
161 160.6 -0.4 36.8 37.8 1
162.2 162.8 0.6 12.8 14 1.2
118.6 116.8 -1.8 22.8 24.9 2.1
123.6 118 -5.6 23.9 23.2 -0.7
136 134.4 -1.6 13 13.6 0.6
140 141.6 1.6 29.2 28.6 -0.6
141.4 143.6 2.2 32.7 31.1 -1.6
146.4 146.2 -0.2 30.1 30 -0.1
154.2 150.6 -3.6 32.5 34.1 1.6
157.2 153.6 -3.6 15.1 15.7 0.6
147.6 156.6 9 16.4 14.9 -1.5
156 157.8 1.8 16.5 17.1 0.6
166.6 162.6 -4 36.7 36 -0.7
164.2 163.4 -0.8 36.7 36.3 -0.4
161 163.8 2.8 20.6 20.6 0
160 164.2 4.2 40.9 41 0.1
170 166.2 -3.8 22.1 22.3 0.2
172.8 171 -1.8 20.1 19.5 -0.6
171.4 173.8 2.4 24.5 25.8 1.3
190.8 189.6 -1.2 39.9 38.6 -1.3
188.6 198.8 10.2 20.7 22.8 2.1
210 199.8 -10.2 35.2 34.1 -1.1
249 242 -7 33.4 32.1 -1.3
261.6 255.6 -6 43.3 43.6 0.3
100.8 98.4 -2.4
15 11.9
188.6 186.4 -2.2 19.6 20.8 1.2
200.8 203.4 2.6 14 13.4 -0.6
153.2 152.8 -0.4 28.3 29.7 1.4
210.2 212.6 2.4















sample size 36
sample size 35

sample mean -0.35
sample mean 4.18

sample stdev 3.96
sample stdev 21.72












stand. err. se




tcritical




margin error E




lower bound




upper bound




Null hypothesis. H0: µdifference = 0




Alternate hypothesis. H1: µdifference ≠ 0