From 23c9b28a3076c60306259596385ca1172f8311f2 Mon Sep 17 00:00:00 2001 From: eggy Date: Tue, 29 Sep 2020 12:22:58 -0400 Subject: [PATCH] math: make grouped data quartiles accurate --- docs/mhf4u7.md | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/docs/mhf4u7.md b/docs/mhf4u7.md index 023e363..c37c49d 100644 --- a/docs/mhf4u7.md +++ b/docs/mhf4u7.md @@ -97,9 +97,7 @@ The first and third quartiles are the median of the **[minimum, median)** and ** When working with grouped data given in ranges, the actual data is unavailable. The five numbers above are instead: - The minimum value is now the lower class boundary of the lowest class. - - The first quartile is the midpoint of the class it resides in. - - The median is the midpoint of the class it resides in. - - The third quartile is the midpoint of the class it resides in. + - The first and third quartiles, as well as the median, are now found by guesstimating the value on a cumulative frequency curve. - The maximum value is now the upper class boundary of the highest class. If the highest value is excluded (e.g., $90≤x<100$), it also must be excluded when representing data (e.g., open dot instead of filled dot). - A specific percentile can be found by guesstimating the value on a cumulative frequency curve.