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→Meaning
: 1. To check for mistakes in our [[results]] called '[[Anomaly|anomalies]]'.
: 2. To calculate an [[Mean Average|average]] when we are taking [[Measure|measurements]].
===Examples===
{| class="wikitable"
|+Investigating the claim: All trees have green leaves.
|-
|'''Oak Leaf'''
|'''Beech Leaf'''
|'''Ash Leaf'''
|-
|[[File:OakLeaf.png|center|200px]]
|[[File:BeechLeaf.png|center|200px]]
|[[File:AshLeaf.png|center|200px]]
|-
|'''Maple Leaf'''
|'''Chestnut Leaf'''
|'''Variables'''
|-
|[[File:MapleLeaf.png|center|200px]]
|[[File:ChestnutLeaf.png|center|200px]]
| style="height:20px; width:200px; text-align:left;" |
The maple leaf is the only red leaf. What if the leaf you picked was the only one of its kind? You cannot tell if you only do the experiment once. You should get at least 3 leaves from each type of tree to check the red leaf is not an [[anomaly]].
|}
==Key Stage 3==
===Meaning===
A '''repeat''' is when an [[experiment]] is done by the same person again.
===About Repeats===
: [[Repeat]]s are done in order to:
:*Check for [[Anomaly|anomalies]].
:*Calculate an [[Mean Average|average]] (this reduces the effects of [[Random Error|random errors]]).
==Key Stage 4==
===Meaning===
'''Repeats''' are when an [[experiment]] is performed multiple times by the same person.
===About Repeats===
: [[Repeat]]s are done in order to:
:*Compare [[results]] to check the [[experiment]] is [[repeatable]] and therefore a [[reliable]] [[experiment]].
:*Check for [[Anomaly|anomalies]].
:*Calculate an [[Mean Average|average]] (this reduces the effects of [[Random Error|random errors]]).