and the council group, an has been calculated for such measures. ‘index score’ The index score is calculated and represented as a score out of 100 (on a 0 to 100 scale), with responses excluded from the analysis. The for each scale ‘can’t say’ ‘% RESULT’ category is multiplied by the This produces an for each ‘INDEX FACTOR’. ‘INDEX VALUE’ category, which are then summed to produce the equating to in the ‘INDEX SCORE’, ‘60’ following example. Index Scale Categories % Result Index Value Factor Very good 9% 100 9 Good 40% 75 30 Average 37% 50 19 Poor 9% 25 2 Very poor 4% 0 0 say 1% -- INDEX SCORE 60 Can’t Similarly, an index score has been calculated for the core question direction in ‘Performance the last 12 based on the following scale for each performance measure category, months’, with responses excluded from the calculation. ‘Can’t say’ Index Scale Categories % Result Index Value Factor Improved 36% 100 36 Stayed the same 40% 50 20 Deteriorated 23% 0 0 say 1% -- INDEX SCORE 56 Can’t Index Scores Significant Difference Calculation The test applied to the indexes was an Independent Mean Test, as follows: Z Score = ($1 - $2) / Sqrt (($3*2 / $5) + ($4*2 / $6)) Where: $1 = Index Score 1 $2 = Index Score 2 $3 = unweighted sample count 1 $4 = unweighted sample count 1 $5 = standard deviation 1 $6 = standard deviation 2
and the council group, an ‘index score’ has been calculated for such measures. The index score is calculated and represented as a score out of 100 (on a 0 to 100 scale), with ‘can’t say’ responses excluded from the analysis. The ‘% RESULT’ for each scale category is multiplied by the ‘INDEX FACTOR’. This produces an ‘INDEX VALUE’ for each category, which are then summed to produce the ‘INDEX SCORE’, equating to ‘60’ in the following example. Scale Categories % Result Index Factor Index Value Very good 9% 100 9 Good 40% 75 30 Average 37% 50 19 Poor 9% 25 2 Very poor 4% 0 0 Can’t say 1% -- INDEX SCORE 60 Similarly, an index score has been calculated for the core question ‘Performance direction in the last 12 months’, based on the following scale for each performance measure category, with ‘Can’t say’ responses excluded from the calculation. Scale Categories % Result Index Factor Index Value Improved 36% 100 36 Stayed the same 40% 50 20 Deteriorated 23% 0 0 Can’t say 1% -- INDEX SCORE 56 Index Scores Significant Difference Calculation The test applied to the indexes was an Independent Mean Test, as follows: Z Score = ($1 - $2) / Sqrt (($3*2 / $5) + ($4*2 / $6)) Where: $1 = Index Score 1 $2 = Index Score 2 $3 = unweighted sample count 1 $4 = unweighted sample count 1 $5 = standard deviation 1 $6 = standard deviation 2