###### Answer: B. real income approximates percentage change in nominal income minus percentage change in price level.

In statistics the 68– 95 –99.7 rule also known as the empirical rule is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: 68% 95 % and 99.7% of the values lie within one two and three standard deviations of the mean respectively.. In mathematical notation these facts can be expressed as follows where Χ is an …

If a data distribution is approximately normal then about 68 percent of the data values are within one standard deviation of the mean (mathematically μ ± σ where μ is the arithmetic mean) about 95 percent are within two standard deviations (μ ± 2σ) and about 99.7 percent lie …

Relative change and difference – Wikipedia

Relative change and difference – Wikipedia

68–95–99.7 rule – Wikipedia

68–95–99.7 rule – Wikipedia

In any quantitative science the terms relative change and relative difference are used to compare two quantities while taking into account the “sizes” of the things being compared. The comparison is expressed as a ratio and is a unitless number.By multiplying these ratios by 100 they can be expressed as percentages so the terms percentage change percent (age) difference or relative …

Thu Mar 25 2004 13:30:00 GMT-05…