SimpleStatistics

Learning some maths and data structures by coding them.

MathTools methods:

• frequency distribution (,
• mode from freq. distr.
• mean from freq. dist.
• geometric mean from freq dist (not working!)
• geometric mean from arrayList

Read

• methods for reading from -keyboard
• to
  • strings
  • ints
  • doubles

Interaction between methods: - ints to strings - doubles to strings

ToDo:

Read

• from keyboard (ok)
• text file
• csv
• xls etc.

Save

• dataset
• prints

MathTools

• observations --> list (ok)

• frequency distribution --> hashmap (ok)

  • add percentages

• sum frequency

• ordering

• class limits, classification

descriptive statistics

• mode ok

• median

  • quartiles, fractiles

• mean (arithmetic?)

  • geometric (ok)
  • harmonic

• class average

dispersion

• range

• quartile range & poikkeama

• variance

• standard deviation

• dependency ratio (? -- riippuvuuskertoimet)

• correlation

• covariance

Graphical presentation....