The weather app on Myra's phone tracks the Air Quality Index (AQI), a measure of how clean the outdoor air is. When the AQI is below 51, Myra knows the air quality is considered good. Last week, the levels in her area ranged from 40 to 48. The mean AQI for the week was about 43.9, with a mean absolute deviation of about 2.4.
What can you conclude from these data and statistics? Select all that apply.