An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. data was collected from 248 students. can we conclude that freshman housing location and academic performance are related? location average below average above average total 145 103 248 on campus 30 31 36 67 off campus 31 36 total 115 copy data step 2 of 8: find the expected value for the number of students that live on campus and have academic performance that is average. round your answer to one decimal place.

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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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

answer: 4 (:

step-by-step explanation:

d is the answer

step-by-step explanation: