The Environmental Protection Agency records data on the fuel economy of many different makes of cars. Data on the mileage of 20 randomly selected cars are listed below. The values are ordered for convenience. 12 13 15 16 16 17 18 18 19 19
20 20 22 23 24 26 26 27 27 29
What is the interquartile range for the mileage data?
A) 8.5 miles per gallon
B) 16.5 miles per gallon
C) 17 miles per gallon
D) 25 miles per gallon

A) 8.5 miles per gallon

Step-by-step explanation:

Given

Required

The IQR

This is calculated as:

Calculate

Remove bracket

This means that:

is the mean of 5th and 6th item

From the given data:

So, we have:

Calculate

Remove bracket

This means that:

is the mean of 15th and 16th item

From the data:

So:

Recall that:

step-by-step explanation:

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.