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Understanding Data

Whether you're trying to analyze a political poll, the results of a scientific study, or just your sleeping habits, data is the best tool for understanding the world around you. Dive in and see how!

Level 2

         

What is wrong with this news coverage?

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Chung Kevin by Chung Kevin

The average age of the family (father, mother, and several children) is 18. If the father, who is 38 years old, is not included, then the (new) average would be 14. Find the number of children in the family.

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Timothy Wong by Timothy Wong

There are eight people in a family. One of the members receives \(x\) presents. Five members receive \(x+4\) each and the rest only get \(x-2\) each.

Consider the 8 numbers of presents received, and find \[2 \times \mathrm{mode} - \mathrm{mean} - \mathrm{median}.\]

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Michael Ng by Michael Ng

The sum of \(N\) real numbers (not necessarily unique) is 20. The sum of the 3 smallest of these numbers is 5. The sum of the 3 largest is 7. Which of the following are possible values for \(N\)?

I. 9
II. 10
III. 11

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Calvin Lin by Calvin Lin

The value of \(x\) is the mean of the numbers in the white circles. The values of \(y\) is the mean of numbers in the blue circles.

Find \(x-y\).

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Victor Paes Plinio by Victor Paes Plinio
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