calculations

• what are inferential statistics


  descriptive statistics that describe the data in terms of mean, median, mode, range, standard deviation
• what can inferential statistics do 


  they aid in finding a significant distance between 2 sets of data
• what is nominal data?


  data (from study) that has been allocated into categories by counting frequency and occurrence
• what is meant by ordinal data?


  where data collected from a study is placed in order from first to last
• what is interval/ratio data?


  data measured in fixed units with equal differences between all points on the scale of data
• what does ratio data have that can distinguish between interval and ratio data?


  ratio data has the true value of zero, interval doesn't
• what are the 4 statistics tests for psych

  1. Chi Squared Test
  2. Mann-Whitney U Test
  3. Wilcoxon's Test
  4. Spearman's Rank Order
• if the study was a test of difference and I had nominal data. What statistics test would I use?


  Chi Squared Test
• if the study was testing differences and i have Ordinal data what test would I use?


  Mann-Whitney U Test
• if the study wa testing differences and i had interval/ratio data what test would I use?


  Mann-Whitney U Test After converting to rank order data
• if i was testing difference and had a repeated/matched design and had interval/ratio data what test am i using

  Wilcoxon's Test
• if i was testing difference in a repeated/matched design and I had ordinal data what test should i use?


  Wilcoxon's Test
• if i was testing correlation and i had ordinal data what test would I use?

  Spearman's rank order correlation coefficient
• if i was testing correlation and i had interval/ratio data what test would i use?

  Spearman's Test after having ranked ordered the data