A study is conducted to assess the potential benefits of an ayurvedic treatment to reduce high cholesterol. Seven patients (n = 7) agree to participate in the study. Each has their cholesterol measured at the start of the study and then again after four weeks taking a popular herb called arjuna. The data in the table below indicate total cholesterol level for each participant before and after taking the herb. Is there a significant difference in total cholesterol after taking the herb? Use the Sign test with a 5% level of significance.
|
Participant
|
Total Cholesterol Before Treatment
|
Total Cholesterol After Treatment
|
|
|
1
|
250
|
241
|
|
2
|
265
|
260
|
|
3
|
240
|
253
|
|
4
|
233
|
230
|
|
5
|
255
|
224
|
|
6
|
275
|
227
|
|
7
|
241
|
232
|