A data set from a study that examined the effect of a specific diet on blood pressure is provided on the course web page. 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. The other variables in the data set are drug (X, Y, or Z) and a biofeedback condition (present or absent), but we wish to focus on the diet effect here. Test whether there is a statistically significant difference in mean blood pressure between the diet groups. Report the appropriate test statistic, df, and p-value. 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 provided on the course web page. 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. The other variables in the data set are drug (X, Y, or Z) and a biofeedback condition (present or absent), but we wish to focus on the diet effect here. Test whether there is a statistically significant difference in mean blood pressure between the diet groups. Report the appropriate test statistic, df, and p-value. 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

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A data set from a study that examined the effect of a specific diet on blood pressure is provided on the course web page. 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. The other variables in the data set are drug (X, Y, or Z) and a biofeedback condition (present or absent), but we wish to focus on the diet effect here.

Test whether there is a statistically significant difference in mean blood pressure between the diet groups. Report the appropriate test statistic, df, and p-value.

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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