The #'s are 190, 200, 210, 220, 230, 240, 250, 260
1. What is the lower quartile? The upper quartile?
209; 245
190; 260
209; 235
235; 245
2. Which quartile contains most of the data?
lower quartile
middle quartile
upper quartile
My Question
3. What is a quartile, how do you get the quartile, and what does it do?
2007-02-20 01:30:17 · 2 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Quartiles: Quartile is another term referred to in
percentile measure. The total of 100% is
broken into four equal parts: 25%, 50%, 75%
100%.
Lower Quartile is the 25th percentile. (0.25)
Median Quartile is the 50th percentile. (0.50)
Upper Quartile is the 75th percentile. (0.75)
unless #1 & 2 are trick questions - I only have an answer for #3 because of the percents involved.
2007-02-20 13:02:00 · answer #1 · answered by Anonymous · 1⤊ 0⤋
From Wikipedia:
In descriptive statistics, a quartile is any of the three values which divide the sorted data set into four equal parts, so that each part represents 1/4th of the sample or population.
Thus:
first quartile (designated Q1) = lower quartile = cuts off lowest 25% of data = 25th percentile
second quartile (designated Q2) = median = cuts data set in half = 50th percentile
third quartile (designated Q3) = upper quartile = cuts off highest 25% of data, or lowest 75% = 75th percentile
I think you should be able to take it from there...
2007-02-20 09:40:18 · answer #2 · answered by Steve H 4 · 0⤊ 0⤋