SCENARIO 10-16-A
a Survey on Men and Women's Shopping Behavior

SCENARIO 10-16-A
A survey on men and women's shopping behavior collected data from a sample of 50 men and 50
women. The following data on online shopping spending every month are stored in the file
Scenario10-16-DataA.XLSX. $$\begin{array} { l r r r r r r r r r r } \text { Men } & 148 & 211 & 256 & 309 & 190 & 205 & 203 & 208 & 231 & 125 \\& 149 & 205 & 195 & 178 & 196 & 198 & 110 & 199 & 181 & 168 \\& 218 & 222 & 206 & 168 & 239 & 130 & 246 & 149 & 262 & 142 \\& 174 & 181 & 198 & 147 & 143 & 185 & 200 & 166 & 171 & 133 \\\text { Women } & 295 & 242 & 299 & 209 & 189 & 173 & 109 & 291 & 208 & 227 \\& 272 & 176 & 251 & 235 & 145 & 179 & 30 & 135 & 200 & 270 \\& 174 & 123 & 199 & 195 & 192 & 102 & 110 & 184 & 228 & 316 \\& 170 & 234 & 163 & 245 & 174 & 126 & 227 & 86 & 96 & 185 \\& 288 & 154 & 217 & 184 & 154 & 217 & 222 & 175 & 265 & 196 \\& 172 & 113 & 240 & 235 & 269 & 243 & 131 & 134 & 56 & 164\end{array}$$ Treat the men as population 1 and the women as population 2.
-Referring to Scenario 10-16-A, what assumption(s) is(are) necessary when testing whether there is evidence of a difference in the variances to be valid?

A) Both sampled populations are normally distributed.
B) Both samples are random and independent.
C) Neither (a) nor (b) is necessary.
D) Both (a) and (b) are necessary.