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David Zhang

Complete race history and performance trends

Performance Analytics
Understanding Performance Data
Performance Score: Individual race rating reflecting strength of competition and finishing position.
Updated Rating: Cumulative rating that evolves based on recent performances and past history.
Date Event Race Place Time Perf Score Rating
10/15 CIML Conference XC CIML Conference Cross Country Boys JV 5 km 126 21:41.59 1300 1342
10/10 Ft Dodge Cross Country Invite Fort Dodge Cross Country Invite JV boys 344 21:30.70 1359 1371
10/05 Dan Huston/Steve Johnson Invitational Boys JV 5000M 213 21:32.70 1385 1382
09/17 50th Tom Karpen XC Invite 50th Tom Karpen XC Invite JV boys 101 22:59 1387 1377
09/12 51st Marshalltown Bobcat xc Invite 51st Marshalltown Bobcat xc Invite JV boys 202 20:54.20 1373 1369
08/31 Dragon Sunrise XC Invite Dragon Sunrise XC Invitational - Boys 161 21:51 1363 1363
Date Event Race Place Time Perf Score Rating
10/05 Fort Dodge Invite Mens 5,000 Meters Junior Varsity 352 21:17.40 1367 1370
09/07 50th Bobcat XC Invitational 50th Bobcat XC Invitational JV Boys 219 21:47.29 1377 1379
Performance Trends Over Time

Visual representation of performance progression across all seasons. Box plots show rating uncertainty ranges, with the blue line indicating updated ratings and red dotted line showing individual race performance scores.

Reading the Chart: Box plots illustrate rating ranges and uncertainty. Performance scores outside expected ranges can lead to significant rating adjustments, reflecting the dynamic nature of performance evaluation. Season breaks are marked with vertical lines.