Histograms and Box Plots Flashcards

Grade 6 · Math · Flashcards

Key vocabulary and concepts for histograms and box plots in Grade 6 math.

Flashcards

Histogram: A bar graph for continuous data — bars touch, x-axis shows intervals, y-axis shows frequency
Box plot: Shows five-number summary: min, Q1, median, Q3, max in a single diagram
Five-number summary: Minimum, Q1, Median (Q2), Q3, Maximum — fully describes a data set
Q1 (First Quartile): The median of the lower half of data — 25% of data falls below this
Q3 (Third Quartile): The median of the upper half of data — 75% of data falls below this
IQR: Interquartile Range = Q3 − Q1 — spread of the middle 50%
Median in box plot: Vertical line inside the box — not necessarily in the center
Whiskers: Lines extending from the box to the min and max values
Symmetric histogram: Bell-shaped; data is balanced on both sides of center
Skewed right histogram: Tail extends right; most data is on the left side
Skewed left histogram: Tail extends left; most data is on the right side
Why box plots are useful: Great for comparing two data sets' spread and center at a glance
Range vs IQR: Range = max − min (all data); IQR = Q3 − Q1 (middle 50% only)