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It probably means different things in different contexts - as do most short acronyms. One meaning of CPI is characters per inch. If that doesn't make sense, go to AcronymFinder, or to Wikipedia, to find additional meanings of this acronym; or as a more specific question, i.e., providing the context where it appears.
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Can the CPI be negative?
If, by CPI, you mean the consumer price index, the answer is not unless people are paid to take things away from shops!
How much is a 2 liter bottle of soda in 1995?
Assuming this is an inflation problem, you can use the consumer price index (CPI) to estimate. The CPI is a measure of consumer prices compared to a base year value, usually the price in 1982. CPIn / 100 = (Price in year n / Price in 1982) The CPI for 2010 is ~218. The CPI for 1995 is ~152. The CPI for 1982 is 100 by definition (hence why we divide the CPI by 100). A 2L of coke is approximately $2.25 from a cursory search over the internet. Therefore 2.18 = (2.25 / price in 1982) Price in 1982 = 1.03 1.52 = (price in 1995 / 1.03) $1.56 = Price in 1995 CPI are published by the department of labor and are available at ftp://ftp.bls.gov/pub/special.requests/cpi/cpiai.txt obviously sub in any more relevant data you have
Can CPI be negative?
The best known CPI is the Consumer Price Index and that cannot be negative.
What is a math typical value?
The mean is that value that is most commonly referred to as the average.The typical value is a synonym for the mean and average.The typical value is the mean.
What does a negative z-score mean?
z-score of a value=(that value minus the mean)/(standard deviation). So if a value has a negative z-score, then it is below the mean.
