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Score. 51. -1.81 points IllowskyintroStat1 4.HW.080. My Notes Ask Your Teache A university has 14 statistics classes scheduled for its Summer 2013 term. One class has space avalable for 30 students, eight classes have space for 50 students, one class has space for 80 students, and four classes have space for 100 students (a) What is the average class size assuming each class is filled to capacity? (Enter youur answer as a whole number ) students (b) Space is available for 910 students. Suppose that each class is filled to capacity and select a statistics student at random. Let the random variable X equal the size of the student's dlass Define the PDF for X. (Enter your answers as fractions.) PIXx) xP(Xx) 30 50 80 100 (c) Find the mean of X. (Enter your answer as a whole number) students (d) Find the standard deviation of X. (Round your answer to two decimal places.) students Submit Answer View Previous Question Question 51 of 55 View Next Question

Answer 1

-Gin A unie iy har 14 Atatitics Clam Aeduld kor 9013 tm Aunmu 1 Cla har Apa avafhtor 30 tudout 50 udu 8 clate ha Apa avoib paa for 80 Atudeut i cla han Apaa lo0tudeut 4 clae as Awwe Aage Clam Ai (1 50) (850)+ * 80) + (4* r00). 14 65 30t 400 80 + 400 14 ь X PCx) x-PCx) 30/4 400/14 814 50 80 8о14 цо ју 100

육+ 후육 , 400 400 14 30 Ε x)- Σx. pa) 14 T(30+uo08o +uoo) = (9lo) 65 vaaian G X Var (x) EC)-(E E(x) t (50 900 2s00 x 8 +1000x4 14 6400 t 14 14 14 H 0020,000 t 64100+ L0,000) 161,300) 4803. 14286 11 Noo, Var Cx) E(x")(F(x 4803 14286 Nax Cx = 4807 1u286 582. 14286 Standaid duialiy VaCx) 582 1428 6 24.13