MATHS

MATHS

1. BOX PLOTS AND HISTOGRAMS

   • IN A HISTOGRAM THE AREA OF THE BAR REPRESENTS THE FREQUENCY THE HEIGHT OF EACH BAR IS THE FREQUENCY DENSITY
   • FREQUENCY DENSITY= FREQUENCY÷CLASS WIDTH
   • THE INTERQAURTILE RANGE MEASURES THE SPREAD OF THE MIDDLE 50% OF THE DATA
   • TO COMPARE DATA SETS COMPARE A MEASURE OF AVARAGE AND A MEASURE OF SPREAD
   • TO DESCRIBE A DATA SET GIVE A MEAUSRE OF AVARAGE AND MEASURE OF SPREAD
   • WHAT TO COMPARE- AVARGE-MEAN MODE MEDIAN RANGE- ACTUAL INTERQAURTILE
   • THE MEDIAN AND INTERQAURTILE RANGE ARE NOT AFFECETED BY EXTREME VALUES OR OUTLIERS

2. INEQAULITY GRAPHS

   • DOTTED LINE- WHEN LESS/GREATER THAN BUT NOT EQAUL TO
   • SOLID LINE- EQAUL TO AND GREATER/LESS THAN

3. MEAN MODE MEDIAN AND RANGE

   • MEAN- ADD ALL NUMBERS TOGETHER AND DIVIDE BY HOW MANY THERE ARE
   • MODE- MOST POPULAR NUMBER
   • MEDIAN- MIDDLE NUMBER WHEN IN ORDER
   • RANGE- DIFFERENCE BETWEEN THE HIGHEST AND LOWEST NUMBER

4. REGULAR AND IREGULAR

   • REGULAR- ALL SIDES AND ANGLES ARE THE SAME
   • IREGULAR- SIDES AND ANGELS AND ARE ALL DIFFERENT