The following data represent the number of different communication activities (e.g., cell phone, text messaging, e-mail, Internet, and so on) used by a random sample of teenagers over the past 24 hours.

(a) Are the events €œmale€ and €œ0 activities€ independent? Justify your answer.
(b) Are the events €œfemale€ and €œ5+ activities€ independent? Justify your answer.
(c) Are the events €œ1-2 activities€ and €œ3-4 activities€ mutually exclusive? Justify your answer.
(d) Are the events €œmale€ and €œ1-2 activities€ mutually exclusive? Justify your answer.

Transcribed Image Text:

Activities Male Female Total 21 21 42 1-2 81 52 133 3-4 60 56 116 38 71 109 5+Total 200 200 400