Tim was planning for a meeting with his boss to discuss a raise in his annual salary. In
preparation, he wanted to use the Consumer Price Index to determine the percentage
increase in his real (inflation-adjusted) salary over the last three years. Which of the
four methods of data collection was involved when he used the Consumer Price Index?
a. Published sources
b. Experimentation
c. Surveying
d. Observation

answer:

c 60% on edg

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

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