Does music improve sleep quality? To find out, researchers studied 94 students ages 19 to 29 years. The students were divided into three groups. The first group listened to relaxing classical music for 45 minutes at bedtime for three weeks. The second group listened to an audiobook for the same periods. The researchers gave no instructions to the third group. To measure sleep quality, the individuals completed the Pittsburg Sleep Quality Index before, during, and after the three weeks. The researchers concluded that listening to relaxing classical music for 45 minutes at bedtime improves sleep quality in students ages 19 to 29 years.
a. What question were the researchers trying to answer?
b. Identify the sample.
c. Identify the population.
d. Identify the conclusion. Is it part of descriptive or inferential statistics? Explain.