2006-11-23 22:12:42 · 5 answers · asked by bunnyBoo 3 in Education & Reference ➔ Other - Education
arrange the numbers in ascending sequence then the first 25% make the first quartile and so on
so...
1,1,1,2,2, 3,4,5,9,9, 10,12,12,15,20 21,21,21,23,28
the first quartile is 1-2,
second 3-9
third10-20
fourth 21-28
If you want to find the 95th percentile it's 95% of the way up.
In the sequence above the 23rd value (21) is 92% and the 24th value (23) is 96%. So the 95% percentile lies 75% of the way between these values. (23-21) * 0.75 = 1.5 so the 95th percentile is 22.5
The median is the 50th percentile (9.5)
If the median > mean then the distribution is positively skewed
If the median < mean then the distribution is negatively skewed
If the median = mean then the distribution is normally distributed
2006-11-23 22:24:44 · answer #1 · answered by Krop 2 · 0⤊ 0⤋
Following on from the very comprehensive answer from Krop the only time I have seen the term interquartile range used they wanted the range of the two inner quartiles.
This ignores the extremes (the first and last quartiles) and gives a better idea of the spread in one number than the full range would have done.
2006-11-23 23:31:20 · answer #2 · answered by tringyokel 6 · 0⤊ 0⤋
Hi m8????
it spelt INTERQUARTILE..... anyway it worked out as the Upper Quartile minus the Lower Quartile( U.Q - L.Q ), ie, 75% of the range minus 25% of the same range.....that's all!!!!!!!!!
2006-11-23 23:51:50 · answer #3 · answered by triokin 1 · 0⤊ 0⤋
you calculate the upper quartile and the lower quartile....the interquartile range is the upper quartile minus the lower quartile!
2006-11-24 04:57:04 · answer #4 · answered by Little Miss Helellena 3 · 0⤊ 0⤋
Are you meaning the inner thhigh muscles? If so leg lifts while laying on your side take care of that along with jumping jacks.
2006-11-23 22:22:07 · answer #5 · answered by bored_at_work 2 · 0⤊ 3⤋