Is it possible to get the Mean and Standard Deviation values you used across the key metrics for the LJ 2022 star ratings of libraries in the $10M-$29.9M with a LSA of 100k-250k? If I use the posted data for star libraries reported, using your formulas, I don't get anywhere near the same scores. I assume it is because I am using a small sample of 13 libraries to calculate the Mean and StdDev.
For example if I calculate the Mean & StdDev for the libraries in the $10M-$29.9M category with a LSA of 100k-250k (13 libraries) and use that for the calculations
(((Lib data -Peer Pop Mean) / Peer Pop StdDev) +8) *100 I get a Score of 1,551 for Naperville instead of the 2,669 in the report. I do sum the scores for each category before I add the 8 as shown below
Naperville Public Library
Physical Circulation 22.52
Minus Physical Circulation Mean 11.73
= 10.79
Divided by Physical Circulation StdDev 6.98
score for circulation = 1.551
Circ Score 1.55 Em Score -0.05 Visit Score 2.71 Prog Attnd Score 1.09 Comp Use Score 1.82 Wi Fi Session Score 0.39 ER Score Raw 2.14 Score Sum 7.51 + 8 = 15.51 x100 = 1551
And so on for each key category. The results for each category are added up, 8 is added and that sum multiplied by 10 as per your 7 Step "Score Calculation Algorithm"
Is it possible to get the Mean and Standard Deviation values you used across the key metrics for the LJ 2022 star ratings of libraries in the $10M-$29.9M with a LSA of 100k-250k? If I use the posted data for star libraries reported, using your formulas, I don't get anywhere near the same scores. I assume it is because I am using a small sample of 13 libraries to calculate the Mean and StdDev.
For example if I calculate the Mean & StdDev for the libraries in the $10M-$29.9M category with a LSA of 100k-250k (13 libraries) and use that for the calculations
(((Lib data -Peer Pop Mean) / Peer Pop StdDev) +8) *100 I get a Score of 1,551 for Naperville instead of the 2,669 in the report. I do sum the scores for each category before I add the 8 as shown below
Naperville Public Library
Physical Circulation 22.52
Minus Physical Circulation Mean 11.73
= 10.79
Divided by Physical Circulation StdDev 6.98
score for circulation = 1.551
Circ Score 1.55 Em Score -0.05 Visit Score 2.71 Prog Attnd Score 1.09 Comp Use Score 1.82 Wi Fi Session Score 0.39 ER Score Raw 2.14 Score Sum 7.51 + 8 = 15.51 x100 = 1551
And so on for each key category. The results for each category are added up, 8 is added and that sum multiplied by 10 as per your 7 Step "Score Calculation Algorithm"
Posted : 2023-06-21 18:15:32
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