9028852
Description
Mind Map by Filip Jinga, updated more than 1 year ago
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Created by Filip Jinga
about 7 years ago
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GCSE:Statistics Formula Sheet
- Pearson's Product Moment Correlation
- r=Sxy÷√(SxxSyy)
- Sxy= Σxy(ΣxΣy÷n)
- Sxx=Σx²-(Σx)²÷n
- Syy=Σy²-(Σy)²÷n
- Sxy= Σxy(ΣxΣy÷n)
- r=Sxy÷√(SxxSyy)
- Symbols
- <=Less Than
- >=More Than
- ≥ =Grater Than or Equa to
- ≤= less than or equal to
- <=Less Than
- Pie Charts
- Angle in Pie= Number in Category÷Total Number of Values x 360
- Angle in Pie= Number in Category÷Total Number of Values x 360
- Frequency Density
- Frequency Density= Frequency÷ Class width
- Frequency= Frequency Density x Class Width
- Frequency Density= Frequency÷ Class width
- Mean
- x̅=∑x÷n or x̅=∑fx÷∑f
- x̅=∑x÷n or x̅=∑fx÷∑f
- Standard Deviation
- √∑fx²÷∑f-x̅
- √∑fx²÷∑f-x̅
- Q1,Q2,Q3,IQR
- Q1=n+1÷4
- Q2=n+1÷2
- Q3=Q1+Q2
- IQR=Q3-Q1
- Outliers are values that are:>Q1+1.5(Q3-Q1) or <Q1-1.5(Q3-Q1)
- Q1=n+1÷4
- Index Numbers
- Value÷VAlue in Base Year x 100
- Weighted Index Number= ∑(index no. x weight)÷∑wright
- Value÷VAlue in Base Year x 100
- Probability
- P of an Event= Number of outcomes matching event÷total number of outcomes
- P of Something Happening= No. of Times its happened÷ Number of Trials
- P of an Event= Number of outcomes matching event÷total number of outcomes
- Mean Co-ordinates
- Mean X Co-Ordinate=∑x÷n
- Mean Y Co-Ordinate=∑y÷n
- Mean X Co-Ordinate=∑x÷n
- Equation of the Line
- y=mx+c
- m=gradient
- c= Where the line goes through the y axis
- m=gradient
- y=mx+c
- Standerdised Value
- Value-Mean÷Standard Deviation
- Value-Mean÷Standard Deviation
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