:) solve this correctly only if your good at math

4

Step-by-step explanation:

n = 9

Q2 position = (9+1)/2 = 5th

Q2 = 5

Q1 = (2nd + 3rd)/2 = (3+3)/2 = 3

Q3 = (2nd last + 3rd last)/2

= (7+7)/2 = 7

IQR = Q3 - Q1 = 7 - 3 = 4

false

step-by-step explanation:

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