Question 1042295
No, since there are 20 values the median would be the average of the tenth and eleventh value when they're ordered.
{{{M=(66+66)/2=66}}}
Since there are 20 total values, you can break up the data into two sets of 10.
The lower quartile is the median of the first 10 values.
{{{Q[1]=(64+65)/2=64.5}}}
The upper quartile is the median of the last 10 values.
{{{Q[3]=(67+67)/2=67}}}
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