You are interested in looking into the average arr delay for 6 different month 12, 1, 2, 6, 7 and 8, for 3 different carrier UA , AA and DL , and for distance that are greater than 700 miles, since you suspect that colder months and longer distances may result in longer average arrival delays Note that you need to extract observations from flights and obtain the needed sample means for arr delay , and that you are requird to use dplyr for this purpose

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You are interested in looking into the average  arr delay  for 6 different  month  12, 1, 2, 6, 7 and 8, for 3 different  carrier   UA ,  AA  and  DL , and for  distance  that are greater than 700 miles, since you suspect that colder months and longer distances may result in longer average arrival delays  Note that you need to extract observations from  flights  and obtain the needed sample means for  arr delay , and that you are requird to use  dplyr  for this purpose

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Question: You are interested in looking into the average `arr_delay` for 6 different `month` 12, 1, 2, 6, 7 and 8, for 3 different `carrier` UA,

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