Stats Test Analysis

• Chi Squared first point

  X^2 is bigger/smaller than our critical values of (x-1)
• Chi Squared second point


  This means that there is less/more than 1/5% probability these results could occur by chance
• Chi Squared third point

  Therefore we can accept/reject the null hypothesis and accept/reject the alternative hypothesis (state hypothesis)
• Spearman's Rank first point

  Rs is bigger/smaller than our critical values of ______
• Spearman's Rank second point

  This means that there is less/more than 1/5% probability these results could occur by chance
• Spearman's Rank third point

  Therefore we can accept/reject the null hypothesis and accept/reject the alternative hypothesis (state hypothesis)
• Standard Deviation first point

  as the SD is ___, 68.2% of the data should occur between (mean+1SD) and (mean-1SD) as these are 1 SD away from the mean
• Standard Deviation second point

  according to the coefficient of variation the ratio is (SD/mean) so classed as low (below 1)/ high (above 1) SD showing the data is cluttered/spread around the mean and there is a small/large variation of ________
• Standard Deviation third point

  manipulate raw data e.g. lowest value is smaller than mean-1SD
• degrees of freedom for chi squared


  n-1
• Standard deviation analysis for more than one data set 


  -how much higher the mean was

  -how much higher the range was

  -do the standard deviations overlap

  -smaller standard deviation means the mean is more representative and there are less extreme values
• How to calculate median?

  (n+1)/2
• How to calculate quartiles

  (n+1)/4 from top and bottom