To obtain the national CPI, the BLS collects samples from thirty-seven local areas in four different regions. For each of these local areas in which data is collected, the BLS creates a local CPI. One of the local areas is around the metropolis of Chicago. The margin of error for CPI estimates for the Chicago area is much larger than the margin of error for the national CPI. Identify the primary reason for this.

180

step-by-step explanation:

3

step-by-step explanation:

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.