Question: a researcher at the university of queensland is investigating the...
A researcher at the University of Queensland is investigating the effect of music on the irritability of air-traffic controllers. She recruits 70 participants for her study and plays a classical music (e.g., Mozart) to one group of participants and country music (e.g., Garth Brooks) to the other group of participants. After listening to the music, the participants in each of the group complete an irritability questionnaire. The attached Excel sheet contains the scores on the irritability questionnaire for the two groups. Here, higher scores indicate higher irritability.
Fill in the blanks to help the research find out whether the type of music has a significant effect on irritability. Calculate the lower and upper limits of the 95% confidence interval.