BTEC: Unit 8 Assignment 2- Chi-Squared
step by step how to work out chi squared
Chi-Squared (Χ2)
Learning Objectives:
Learn what Chi-squared is and how to solve it
Complete a Chi-squared test on given data
,Karl Pearson 1857 – 1936
• He was an English
mathematician who
created the worlds
first university
statistics department
at UCL.
• He was offered a OBE
and a knighthood – he
refused both
• He contributed to a lot
of statistical analysis
and his ideas underpin
todays statistical
methods.
, Null Hypothesis
• The Chi-squared test can be used to prove or
disprove a null hypothesis
• A null hypothesis clearly states that there will
be no significant difference between two sets
of data (e.g. observed and expected)
• Therefore the Chi-squared test can either
prove this – there is no significant difference;
or disprove this – there is significant
difference
Write a definition of a null hypothesis
step by step how to work out chi squared
Chi-Squared (Χ2)
Learning Objectives:
Learn what Chi-squared is and how to solve it
Complete a Chi-squared test on given data
,Karl Pearson 1857 – 1936
• He was an English
mathematician who
created the worlds
first university
statistics department
at UCL.
• He was offered a OBE
and a knighthood – he
refused both
• He contributed to a lot
of statistical analysis
and his ideas underpin
todays statistical
methods.
, Null Hypothesis
• The Chi-squared test can be used to prove or
disprove a null hypothesis
• A null hypothesis clearly states that there will
be no significant difference between two sets
of data (e.g. observed and expected)
• Therefore the Chi-squared test can either
prove this – there is no significant difference;
or disprove this – there is significant
difference
Write a definition of a null hypothesis
