Options for 2a: smaller, larger, about equal to 2b: left skewed, right skewed, s

Question

Options for 2a: smaller, larger, about equal to 2b: left skewed, right skewed, symmetric (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.

Explanation / Answer

1)

Q1= 17

Median = 23

Q3= 29

IQR = Q3-Q1

= 29-17

IQR =12

2) The mean of the data set will be about equal to the median because

the histogram is symmetric.

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