
Range. Arithmetic Mean. Median. Mode.  Fun Game  Math Help Tips  It may help, if you think of the given set of numbers in order from smallest to largest. You can rearrange a data set such as {30,40,20,10} to become {10,20,30,40}.  The range of a set of data values is equal to the largest value minus the smallest value. Example: The range of {30,50,20,10} is found by doing the subtraction 5010 to get the range = 40.  The mean of a set of data values equals the sum of the data values divided by the number of data values. Example: To find the mean of {25,25,40}, use addition 25+25+40=90 and the division 90/3 = mean = 30.  The median is the middle value of an odd number of values arranged in order (ascending or descending). Example: The median of the five values {10,25,35,50,50} is 35.  For an even number of ordered values, the median is the mean of the two middle values. Example: The median of the four values {5,10,30,60} is (10+30)/2 = 20.  The mode is the number value which occurs most frequently in a set of data values. Example: The mode of {50,25,35,40,25} is 25.  The game can be played using the mouse by itself or using the keyboard by itself.  The score report automatically appears after you have made 12 choices.  The Math score is based on your choices only and does not count the snowflake hits.  The Game score is reduced by the number of snowflake hits.  If the game doesn't respond to keyboard input, click inside the game area to reset the game's focus.  Press the  and + keys repeatedly to adjust the game speed. 
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