In one given month of august, there were 13,318 flights canceled out of 531,035 total flights in the us. in that month, chicago o'hare had 1,558 flights out of 29,949 of its flights canceled. we want to look at whether or not o'hare airport's performance any different than the performance of the nation's airports as a whole at a 5% level of significance. state the null hypothesis.

the answer will be the last one

do you have a picture of the table

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560

step-by-step explanation: