What is the difference between a upper quartile range and an upper quartile?

Answer 1

The idea when using quartiles is take all your data and write it out in increasing order then divide it in 4 equal parts.The upper

quartile is the part containing the highest data values, the upper

middle quartile is the part containing the next-highest data values,

the lower quartile is the part containing the lowest data values,

while the lower middle quartile is the part containing the next-

lowest data values.

Here is the catch-------------- the terms can also refer to cut-off values between the 4 sets.

The term 'upper quartilevcan be

cut-off value between the upper quartile subset and the upper middle

quartile subset. And, the 'lower quartile' can refer to a cut-off value between the lower quartile set

and the lower middle quartile set. usually we look at the interquartile range (IQR) which is the range between the thrird and 1st quartile

IQR is used to make box plots and other cool graphs.

The upper quartile (Q3) is the median of the upper half of the data set. Q3 cuts off highest 25% of data And just FYI: 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