Question

Is 75 percentile and upper quartile have equal answer ?​

Answer 1

Answer:

Quartiles are used to summarize a group of numbers. Instead of looking a big list of numbers (way too unwieldy!), you are looking at just a few numbers that give you a picture of what’s going on in the big list. Quartiles are great for reporting on a set of data and for making box and whisker plots. Quartiles are especially useful when you’re working with data that isn’t symmetrically distributed, or a data set that has outliers.

All numerical summaries—like mean, median, and mode—give you a few numbers to summarize a large group of data, but what’s special about quartiles is that they split the data up into four equal-size groups.