To test this, consider the population of differences (weight loss that an overweight adult would experience after 20 weeks on the exercise program) – (weight loss that the same adult would experience after 20 weeks on the strict diet). let μ be the mean of this population of differences, and assume their distribution is approximately normal. we test the hypotheses h 0: μ = 0 versus ha: μ ≠ 0, using the matched pairs t test. what is the p-value for this test?