A scientist conducted a study of how often her pet parakeet chirps. She recorded the number of

Question:

A scientist conducted a study of how often her pet parakeet chirps. She recorded the number of distinct chirps the parakeet made in a 30-minute period, sometimes when the room was silent and sometimes when music was playing. The data are shown in the following table.9 Construct a 95% confidence interval for the mean increase in chirps (per 30 minutes) when music is playing over when music is not playing.