Recently, a neurotransmitter called Galanin has been discovered that appears to effect one's desire to eat foods with a high fat content. Specifically, the more of this naturally occurring neurotransmitter an individual possesses, the higher his/her craving for high fat foods. Recently, a drug company developed an experimental drug that blocks Galanin without affecting appetite for lower fat foods. The company immediately sets out to test the drug. An experiment is conducted in which 12 volunteers are randomly selected and given a daily dose of the experimental drug for six months. Their weights are measured before and after the drug treatment. The data from their experiment are listed in the table to the right.        Can the pharmaceutical company conclude that the mean weight after the drug is significantly different than mean weight before the administration of the drug? Test with an α =0.01.       Calculate and interpret the effect size.     Weight before drug treatment (lbs) Weight after drug treatment (lbs) 165 145 143 175 137 170 135 136 148 141 155 138 158 137 140 125 172 161 164 156 178 165 182 170

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  1.     Recently, a neurotransmitter called Galanin has been discovered that appears to effect one's desire to eat foods with a high fat content. Specifically, the more of this naturally occurring neurotransmitter an individual possesses, the higher his/her craving for high fat foods. Recently, a drug company developed an experimental drug that blocks Galanin without affecting appetite for lower fat foods. The company immediately sets out to test the drug. An experiment is conducted in which 12 volunteers are randomly selected and given a daily dose of the experimental drug for six months. Their weights are measured before and after the drug treatment. The data from their experiment are listed in the table to the right. 

 

  1.     Can the pharmaceutical company conclude that the mean weight after the drug is significantly different than mean weight before the administration of the drug? Test with an α =0.01.

 

  1.     Calculate and interpret the effect size.



 

 

Weight before drug treatment (lbs)

Weight after drug treatment (lbs)

165

145

143

175

137

170

135

136

148

141

155

138

158

137

140

125

172

161

164

156

178

165

182

170

 

 

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