Air quality measurements were collected in a random sample

Last updated: 8/1/2023

Air quality measurements were collected in a random sample of 25 country capitals in 2013 and then again in the same cities in 2014 We would like to use these data to compare average air quality between the two years Should we use a paired or non paired test A paired test should be used because for each city the temperature at the two time points will be equal O A non paired test should be used because for each city the temperature at the two time points are independent A paired test should be used because for each city the temperature at the two time points are not independent A paired test should be used because for each city the temperature at the two time points are independent A non paired test should be used because for each city the temperature at the two time points are not independent