research methods

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research methods
- types of data
  - nominal- categories/setgroups
  - interval/ratio- units of equal measurements
- measures of central tendency
  - mean
  - median
  - mode
  - inferential statistics
    - spearman's rank- observed value has to be HIGHER than critical
    - Chi squared- observed value has to be HIGHER than critical
    - Sign test- observed value has to be LOWER than critical
    - Wilcoxen - observed value has to be LOWER than critical
    - Mann Whitney U- observed value has to be LOWER than critical
- measures of dispersion
  - range
  - standard devaition
ordinal- ranked/ordered
- types of data
  - nominal- categories/setgroups
  - interval/ratio- units of equal measurements
standard deviation
- 1. mean of data set
  - 2. take away mean from each score
  - 3. square each difference
    - 4. add together each value
      - 5. divide by n-1
        6. square root value
strengths- precise measurement, all values are taken into account, easy to do and highlights if mean is suitable
- weaknesses-only suitable for ordinal, interval and ratio data

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