FALL 2021 ECO250 FIRST MIDTERM - VERSION B On my honor, I have neither given nor received unauthorized aid on this assignment. Leke Forguy Your Printed Name Your Full Signature 1) You have 60 minutes for 150 points plus bonus 2) Show your work for partial credit! 3) Always write your answer in the provided space at the end of the question! 4) Always fill in the P( ) or the =with the appropriate notation if I left it blank! Question 1 (30 points) Of the 20,000 Students at Not-Berea University, 60% are female. Given different behavior pattern and gender specific dispositions, 10% of the female students are infected by the Coronavirus while 20% of the non-females are infected. F Not-F CV 1200 15, 800 171000 Not-CV 101080 61400 21 800 121 000 201000 a) Fill in the table above using ABSOLUTE FREQUENCIES (if you cannot do it, make up numbers in the table above to be able to answer b) and c) b) What is the chance that an infected student is not female? P( Not Female ) = 15, 800 - 9 P> 100 %? ? P( Not - F ) = 151800 c) Phil claims that all females are safe (aka not infected) and all non-females are doomed (aka infected). If you pick a random Not-Berea University student, what is the chance that this student's infection status supports Phil's claim? P (not infected females (non-females) Question 2 (10 points) P( Of the 20 students who travel to Texas over the break, each one has an independent 10% chance to contact the Coronavirus. What is the chance at least one student will be infected? 20 students on 10 to chance each =.120 = P(All ) 1 -= 8.33 ? P(at least one infected)= 8 - 33