Do popular diets really help customers in the long-run? Many diets help customers lose weight initially only to have the customer add the weight back on after the first few months on the diet. A commercially successful diet company conducted a study of twelve randomly selected customers and measured their weight after before starting the diet and then again after staying with the diet for a year. The company hoped that the initial weight loss would be sustained after the first year on the diet. The data is shown below:
Calculate the test statistic for the Wilcoxon Signed Rank Test to test to determine if the distribution of initial weight is shifted to the right of the distribution of one-year weight.
◦ T
+ = 26
◦ T
- = 19
◦ T
+ = 78
◦ T
+ = 59
Height and weight table
Charting Progress: Weekly Weight Loss Log
Beaker with ibex, dogs, and long-necked birds, from southwest Iran.
Endochondral ossification of long bone.
A Healthy Body Weight
Weight Scale