(6 points) Daily air quality is measured by the Environmental Protection Agency.
ID: 3073502 • Letter: #
Question
(6 points) Daily air quality is measured by the Environmental Protection Agency. This index reports the pollution level for five major air pollutants regulated by the Clean Air Act, one of which is nitrogen dioxide (NO2). The maximum1-hour NO2 concentration in parts per billion (ppb) was reported for a sample of 90 days in 2016 for the Detroit-Warren-Dearborn region in Michigan. The boxplot and relative frequency histogram below show the distribution of the NO2 values on these days. 0 005 004 003 002 001 10 20 30 40 50 Daly maximum1haur NO2 Concentration in ppb 1. Use the histogram to help you match the statistic to the closest number a. Q1 ? b. Median2 2. The mean of the data set will be? the median because the histogram is?Explanation / Answer
1. (a) Q1 = 17
(b) Median = 23
(c) Q3 = 29
(d) IQR = Q3 - Q1 = 29 - 17 = 12
2. The mean of the data set will be equal to the median because the histogram is symmetric.
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