DATA 2.11 Alr quality. Daily air quality is measured by the air quality index (AQI) reported by the Environ- mental Protection Agency. This index reports the pollution level and what associated health effecta might be a concern. The index is calculated for five major alr pollutants regulated by the Clean Air Act and takes values from 0 to 300, where a higher value indicates lower air quality. AQI was reported for a sample of 91 days in 2011 in Durham, NC. The relative frequency histogram below shows the distribution of the AQI values on these days." 16 0.2 (a) Estimate the median AQI value of this sample. 0.15- (b) Would you expect the mean AQI value of this sample to be higher or lower than the median? Explain your reasoning. (e) Estimate 01. 03 and IOR for the distribution. 0.1-

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.