Exam Scores Histogram

This histogram shows the distribution of scores on a 100-point biology exam. The bars group students into score ranges so an instructor can see where results cluster and whether there is a long lower or upper tail. Here, the most common range is 70–79, with fewer students at both extremes. A histogram is a useful complement to the class average because two classes can share the same average while having very different spreads. Use equal-width bins and state whether the upper boundary is included when precision matters. For decisions about teaching or assessment, review individual items and learning objectives alongside the distribution rather than relying on the chart alone.

種類 棒グラフエンジン echarts-bar更新日 2026/9/24

依頼内容

“Create a histogram of 50 biology exam scores using bins 40–49, 50–59, 60–69, 70–79, 80–89, and 90–100 with 2, 5, 11, 16, 12, and 4 students.”

次はこちらAdd a passing threshold at 60.Change the 90–100 bin to five students.

この図に含まれるもの

図の背後にある意思決定を読み解く。

01Bins

Group scores into readable ten-point ranges.

02Center

Identify where most scores occur.

03Threshold

Compare the distribution with the course pass mark.

Use this histogram to review score spread for one assessment, not to judge individual students.

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よくある質問

How is a histogram useful for exam scores?

It shows the distribution of results, including clusters, spread, and unusually low or high score ranges.

Is a histogram the same as a bar chart?

No. A histogram groups continuous numeric values into adjacent ranges, while a bar chart compares separate categories.

Should score bins have equal width?

Usually yes, because equal widths make bar heights directly comparable as frequencies.