Store Checkout Times Histogram

This histogram groups checkout durations from a neighborhood grocery store into equal two-minute ranges. The touching bars show that most transactions finish between four and six minutes, while a smaller right tail takes longer. That shape is more informative than one average because it reveals both the common experience and the less frequent delays. Use a consistent start and end point for timing, such as first scan to payment completion. The bin width should be chosen for the number and spread of observations; two-minute bins make sense here because they are easy to interpret. Investigate long transactions with operational context before deciding whether they represent staffing, payment, basket size, or another cause.

類型 長條圖引擎 echarts-bar更新時間 2026/9/24

需求

“Create a histogram of 102 grocery checkout transactions using 2-minute bins from 0 to 12 minutes with frequencies 8, 24, 37, 21, 9, and 3.”

接著試試Split the 4–6 minute bin into two bins.Add a target line at six minutes.

這張圖裡有什麼

看懂背後的決策。

01Measure

Use complete transaction duration in minutes.

02Bins

Use equal two-minute ranges.

03Tail

Review the small number of transactions above eight minutes.

Use this histogram to see the shape of a checkout-time distribution before changing staffing or lane design.

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常見問題

What does a histogram show?

It shows how often numeric observations fall within consecutive value ranges, called bins.

Why do histogram bars touch?

The ranges represent continuous numeric intervals, so adjacent bins have no category gap.

What is a right tail?

It is a smaller set of observations extending toward higher values on the right side of a distribution.