math

• measurements of central tendency

   a summary measure that attempts to describe a whole set of data
• mean - when we speak average, we always refer to the mean
• median - the median is the midpoint of the data set
• mode - it is the value that occurs most of the time in the data set
• frequently appears - mode

  • 1 mode - unimodal
  • 2 modes bimodal
  • 3 modes - trimodal
  • 4 or more - multimodal
  • 0 mode - nonmodal
• measure of position - it is a number that tells where the score stands relative to the others in a data set
• • quartile = 4
  • decile = 10
  • percentile = 100
• frequency distribution table - is used to summarize and organize data through table
• frequency - is the number of times a certain number occurs
• how to get the range

  HS-LS
• lower limit is the lowest score
• upper limit is the highest score
• mode - is the value that appears most frequently in a set of numbers.
• mean (average) - is the sum of all numbers divided by how many there are
• range - is the difference between the largest and smallest scores in a set of numbers.
• percentage distribution 


  no. of frequency/total no. of frequency x 100
• class marks


  lower limit + upper limit/2
• class boundaries 


  lower limit - 0.5 upper limit+ 0.5
• Probability


  is the branch of mathematics concerning events and numerical descriptions of how likely they are to occur.
• sequence


  a sequence is a function of whose domain is the finite set (1...2...3...n) or the infinite set (1...2...3...,)
• arithmetic sequence


  is a sequence where every term after the first is obtained by adding a constant called the common difference