Posted by William on Tuesday, April 5, 2011 at 7:46pm.
The following data represent what 18 people said when they were asked to estimate the crowd at a public gathering:
325 450 500 500 550 575 575 600 600
650 650 700 700 700 725 750 800 900
State the mean, mode, median
Mean:
325+450+500+500+550+575+575+600+ 600+650+650+700+700+700+725+750+800+900/18 = 625
Median: Is it 600 or 700550=625? If so why? :S I don't understand it...
Mode: 700
Can someone verify if it is correct or wrong?
Thanks

Math  Ms. Sue, Tuesday, April 5, 2011 at 7:53pm
The median is the number between the two in the middle. Half way between 600 and 650 = 625.
http://www.purplemath.com/modules/meanmode.htm

Math  William, Tuesday, April 5, 2011 at 8:09pm
Just to clarify, 18/2= 9 therefore its in position 9 and 10? then add up and divided by two again? This is only for an even number of data right?

Math  Ms. Sue, Tuesday, April 5, 2011 at 8:17pm
Right.
You could have added 600 and 650 and divided by 2 to get 625.
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