4 A study was conducted among individuals with chronic pain

4) A study was conducted among individuals with chronic pain to determine how effective acupuncture is in relieving pain. A random sample of 15 subjects were chosen and their sensory rates were measured. Assume that the measurements on sensory rates follow a normal distribution.The data from the study are given below:

8.6 9.4 7.9 6.8 8.3 7.3 9.2 9.6 8.7 11.4 10.3 5.4 8.1 5.5 6.9

(c)Report the degrees of freedom associated with the t-distribution.

Solution

here n = 15

thus degrees of freedom = n-1 = 14