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Created page with "==Key Stage 4== ===Meaning=== '''Sample size''' is the number of readings or measurements taken in an investigation. ===About Sample Size=== : The results of..."
==Key Stage 4==
===Meaning===
'''Sample size''' is the number of [[reading]]s or [[measurement]]s taken in an [[investigation]].
===About Sample Size===
: The [[results]] of an [[investigation]] may be [[Reliable|unreliable]] if a small '''sample size''' is used.
: A small '''sample size''' increases the effect of [[anomaly|anomalous]] [[results]] on the [[conclusion]] of the [[investigation]].
: A large '''sample size''' allows [[Mean Average|averages]] to be taken to reduce the [[effect]] of [[Random Error|random errors]].
: A large '''sample size''' makes it easier to spot [[anomaly|anomalous]] [[results]].
===Examples===
====Reliable Investigation====
:[[Hypothesis]] - The taller a person, the larger their foot size.
:[[Method]] - [[Measure]] the [[height]] and foot size of a number of people.
: '''Sample Size''' - 5 people.
This is an [[reliable|unreliable]] [[investigation]] because there are not enough people to be certain of any [[conclusion]]. They may all have very large feet and be short.
:[[Hypothesis]] - The taller a person, the larger their foot size.
:[[Method]] - [[Measure]] the [[height]] and foot size of a number of people.
: '''Sample Size''' - 5,000,000 people.
This is a [[reliable]] [[investigation]] because there are enough people to [[Mean Average|average]] out any [[anomaly|anomalous]] [[results]].
===Meaning===
'''Sample size''' is the number of [[reading]]s or [[measurement]]s taken in an [[investigation]].
===About Sample Size===
: The [[results]] of an [[investigation]] may be [[Reliable|unreliable]] if a small '''sample size''' is used.
: A small '''sample size''' increases the effect of [[anomaly|anomalous]] [[results]] on the [[conclusion]] of the [[investigation]].
: A large '''sample size''' allows [[Mean Average|averages]] to be taken to reduce the [[effect]] of [[Random Error|random errors]].
: A large '''sample size''' makes it easier to spot [[anomaly|anomalous]] [[results]].
===Examples===
====Reliable Investigation====
:[[Hypothesis]] - The taller a person, the larger their foot size.
:[[Method]] - [[Measure]] the [[height]] and foot size of a number of people.
: '''Sample Size''' - 5 people.
This is an [[reliable|unreliable]] [[investigation]] because there are not enough people to be certain of any [[conclusion]]. They may all have very large feet and be short.
:[[Hypothesis]] - The taller a person, the larger their foot size.
:[[Method]] - [[Measure]] the [[height]] and foot size of a number of people.
: '''Sample Size''' - 5,000,000 people.
This is a [[reliable]] [[investigation]] because there are enough people to [[Mean Average|average]] out any [[anomaly|anomalous]] [[results]].