Question 1 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
Researchers wonder if practicing yoga reduces stress levels in adults. They select a random sample of 32 adults and assess their current stress levels. The participants are told to practice 60 minutes of yoga each day for one week. At the end of the week, their stress levels are assessed again. The mean difference (pre-yoga – post-yoga) in stress scores is 2.68 points with a standard deviation of 5.58 points. A positive value indicates that the subject’s stress level decreased.
Answer
A
Because the P-value is less than α, there is evidence that practicing yoga is associated with lower stress levels, on average, in adults like the ones in the study.
B
Because the P-value is greater than α, there is evidence that practicing yoga is associated with lower stress levels, on average, in adults like the ones in the study.
C
Because the P-value is less than α, there is not sufficient evidence that practicing yoga is associated with lower stress levels, on average, in adults like the ones in the study.
D
Because the P-value is greater than α, there is not sufficient evidence that practicing yoga is associated with lower stress levels, on average, in adults like the ones in the study.