Data: Everyday Playbook

重要なポイント

• Ask two questions of every number your family meets, out of how many and compared with what, and say them aloud so children copy the habit.
• When a headline says a risk has doubled, find the starting figure first; a rare risk that doubles usually stays rare, and your doctor judges what matters.
• Read a chart's axis, time window and units before its shape, and invite your child to spot the trick before you explain it.
• Judge a child's scores on a run of results rather than one, because unusual highs and lows tend to drift back towards normal.
• Treat every app permission as a request for family data: deny by default, grant only what a feature needs, and review devices together monthly.

このbitの内容

1. The number reflex every family can learn

   Most of the data your family meets never sits in a spreadsheet. It arrives as a claim: everyone in my class has a phone, this cream works for nine out of ten people, prices have gone up a lot.

2. When a headline says a risk has doubled

   Scary percentages spread fastest in family groups. The play is to find the starting figure before reacting.

3. When a chart looks alarmingly dramatic

   Charts persuade before anyone reads them, which is why the play is to read the edges first. Check where the vertical axis starts, how long a time window is shown, and whether the numbers are totals or per person.

4. When school scores and percentiles arrive

   School reports mix numbers that sound alike and mean different things. A percentage usually describes marks: sixty-four per cent means sixty-four marks out of every hundred available.

5. When star ratings decide what you buy

   Ratings feel like data, and they are, but a peculiar kind. Every review comes from someone who chose to write, and the people most likely to write had very good or very bad experiences.

6. When an app wants your family's data

   Your family is not only a consumer of data; it is a source. Every app permission is a request for information about where you go, who you know and what you look at.