Histogra,

Question 1

When do you use a histogram?

Answer 1

• used when the independant variable is numerical and the data are continuous

Question 2

What needs to be done with the data?

Answer 2

• organised into classes

Question 3

What is the class interval?

Answer 3

• range within each class

Question 4

What are the rules for drawing a histogra,?

Answer 4

• use at least half grid provided
• draw in pencil
• x-axis represents the independant variable, and is continuous
  
  • should be properly scaled and labelled with appropriate units
• blocks drawn should not touch
• area of eahc block is proportional to the size of the lcass
• blocks should be labelled
  
  • putting class ranges
  • or lowest number in each range on left side of each blox
• y-axis represents the number or frequency and shopuld be properly scaled with equal intervals
  
  • should be labelled with appropriate units