A data set from a study that examined the effect of a specific diet on blood pressure is below. Participants (n = 72) were randomly assigned either to a group that was put on the diet (Diet = Present) or to a group that was not put on the diet (Diet = Absent), and researchers wanted to know whether the diet had a significant impact on blood pressure. Evaluate the homogeneity of variance assumption for the test and report the results (i.e., is the assumption reasonable for this analysis/data set?). Biofeedback Drug Diet BldPres Present X Absent 170 Present X Absent 175 Present X Absent 165 Present X Absent 180 Present X Absent 160 Present X Absent 158 Present X Present 161 Present X Present 173 Present X Present 157 Present X Present 152 Present X Present 181 Present X Present 190 Present Y Absent 186 Present Y Absent 194 Present Y Absent 201 Present Y Absent 215 Present Y Absent 219 Present Y Absent 209 Present Y Present 164 Present Y Present 166 Present Y Present 159 Present Y Present 182 Present Y Present 187 Present Y Present 174 Present Z Absent 180 Present Z Absent 187 Present Z Absent 199 Present Z Absent 170 Present Z Absent 204 Present Z Absent 194 Present Z Present 162 Present Z Present 184 Present Z Present 183 Present Z Present 156 Present Z Present 180 Present Z Present 173 Absent X Absent 173 Absent X Absent 194 Absent X Absent 197 Absent X Absent 190 Absent X Absent 176 Absent X Absent 198 Absent X Present 164 Absent X Present 190 Absent X Present 169 Absent X Present 164 Absent X Present 176 Absent X Present 175 Absent Y Absent 189 Absent Y Absent 194 Absent Y Absent 217 Absent Y Absent 206 Absent Y Absent 199 Absent Y Absent 195 Absent Y Present 171 Absent Y Present 173 Absent Y Present 196 Absent Y Present 199 Absent Y Present 180 Absent Y Present 203 Absent Z Absent 202 Absent Z Absent 228 Absent Z Absent 190 Absent Z Absent 206 Absent Z Absent 224 Absent Z Absent 204 Absent Z Present 205 Absent Z Present 199 Absent Z Present 170 Absent Z Present 160 Absent Z Present 179 Absent Z Present 179
A data set from a study that examined the effect of a specific diet on blood pressure is below. Participants (n = 72) were randomly assigned either to a group that was put on the diet (Diet = Present) or to a group that was not put on the diet (Diet = Absent), and researchers wanted to know whether the diet had a significant impact on blood pressure. Evaluate the homogeneity of variance assumption for the test and report the results (i.e., is the assumption reasonable for this analysis/data set?). Biofeedback Drug Diet BldPres Present X Absent 170 Present X Absent 175 Present X Absent 165 Present X Absent 180 Present X Absent 160 Present X Absent 158 Present X Present 161 Present X Present 173 Present X Present 157 Present X Present 152 Present X Present 181 Present X Present 190 Present Y Absent 186 Present Y Absent 194 Present Y Absent 201 Present Y Absent 215 Present Y Absent 219 Present Y Absent 209 Present Y Present 164 Present Y Present 166 Present Y Present 159 Present Y Present 182 Present Y Present 187 Present Y Present 174 Present Z Absent 180 Present Z Absent 187 Present Z Absent 199 Present Z Absent 170 Present Z Absent 204 Present Z Absent 194 Present Z Present 162 Present Z Present 184 Present Z Present 183 Present Z Present 156 Present Z Present 180 Present Z Present 173 Absent X Absent 173 Absent X Absent 194 Absent X Absent 197 Absent X Absent 190 Absent X Absent 176 Absent X Absent 198 Absent X Present 164 Absent X Present 190 Absent X Present 169 Absent X Present 164 Absent X Present 176 Absent X Present 175 Absent Y Absent 189 Absent Y Absent 194 Absent Y Absent 217 Absent Y Absent 206 Absent Y Absent 199 Absent Y Absent 195 Absent Y Present 171 Absent Y Present 173 Absent Y Present 196 Absent Y Present 199 Absent Y Present 180 Absent Y Present 203 Absent Z Absent 202 Absent Z Absent 228 Absent Z Absent 190 Absent Z Absent 206 Absent Z Absent 224 Absent Z Absent 204 Absent Z Present 205 Absent Z Present 199 Absent Z Present 170 Absent Z Present 160 Absent Z Present 179 Absent Z Present 179
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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A data set from a study that examined the effect of a specific diet on blood pressure is below. Participants (n = 72) were randomly assigned either to a group that was put on the diet (Diet = Present) or to a group that was not put on the diet (Diet = Absent), and researchers wanted to know whether the diet had a significant impact on blood pressure.
Evaluate the homogeneity of variance assumption for the test and report the results (i.e., is the assumption reasonable for this analysis/data set?).
Biofeedback | Drug | Diet | BldPres |
Present | X | Absent | 170 |
Present | X | Absent | 175 |
Present | X | Absent | 165 |
Present | X | Absent | 180 |
Present | X | Absent | 160 |
Present | X | Absent | 158 |
Present | X | Present | 161 |
Present | X | Present | 173 |
Present | X | Present | 157 |
Present | X | Present | 152 |
Present | X | Present | 181 |
Present | X | Present | 190 |
Present | Y | Absent | 186 |
Present | Y | Absent | 194 |
Present | Y | Absent | 201 |
Present | Y | Absent | 215 |
Present | Y | Absent | 219 |
Present | Y | Absent | 209 |
Present | Y | Present | 164 |
Present | Y | Present | 166 |
Present | Y | Present | 159 |
Present | Y | Present | 182 |
Present | Y | Present | 187 |
Present | Y | Present | 174 |
Present | Z | Absent | 180 |
Present | Z | Absent | 187 |
Present | Z | Absent | 199 |
Present | Z | Absent | 170 |
Present | Z | Absent | 204 |
Present | Z | Absent | 194 |
Present | Z | Present | 162 |
Present | Z | Present | 184 |
Present | Z | Present | 183 |
Present | Z | Present | 156 |
Present | Z | Present | 180 |
Present | Z | Present | 173 |
Absent | X | Absent | 173 |
Absent | X | Absent | 194 |
Absent | X | Absent | 197 |
Absent | X | Absent | 190 |
Absent | X | Absent | 176 |
Absent | X | Absent | 198 |
Absent | X | Present | 164 |
Absent | X | Present | 190 |
Absent | X | Present | 169 |
Absent | X | Present | 164 |
Absent | X | Present | 176 |
Absent | X | Present | 175 |
Absent | Y | Absent | 189 |
Absent | Y | Absent | 194 |
Absent | Y | Absent | 217 |
Absent | Y | Absent | 206 |
Absent | Y | Absent | 199 |
Absent | Y | Absent | 195 |
Absent | Y | Present | 171 |
Absent | Y | Present | 173 |
Absent | Y | Present | 196 |
Absent | Y | Present | 199 |
Absent | Y | Present | 180 |
Absent | Y | Present | 203 |
Absent | Z | Absent | 202 |
Absent | Z | Absent | 228 |
Absent | Z | Absent | 190 |
Absent | Z | Absent | 206 |
Absent | Z | Absent | 224 |
Absent | Z | Absent | 204 |
Absent | Z | Present | 205 |
Absent | Z | Present | 199 |
Absent | Z | Present | 170 |
Absent | Z | Present | 160 |
Absent | Z | Present | 179 |
Absent | Z | Present | 179 |
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