This topic focuses on calculating the mean of a number set after altering one of its elements. It includes problems where a specific number in a list is changed to achieve a new, specified average. These adjustments test understanding of how changing one element influences the overall average, a concept fundamental in statistics. The problems provide multiple choices for what that one number could be changed to in order to reach the desired mean, enhancing problem-solving and analytical skills.
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What can the indicated number can be changed to for these numbers to have the given mean
9, 7, 5
Change a 5 to change the mean to 10