Bekir Önal
Work by Bekir Önal
- Online Retail: when cleaning rules change the answer
Where does an online retailer's revenue really come from, and which customers matter most? I questioned the 'top products' list, found same-day cancelled bulk orders and postage lines counted as products, wrote six documented cleaning rules, then ran RFM segmentation in pandas and again in…
- NHS A&E performance: Leicester vs England
League tables put Leicester's A&E well below England on the four-hour standard, so I tested whether that comparison is fair. I downloaded 24 months of public NHS England files with a Python loop (4,745 rows), compared major A&E departments only, tested a winter effect with Mann-Whitney U…
- Children in Need case study (Social Finance)
Case study for Social Finance: how do children with one Child in Need episode differ from those with three or more, and how does this change with age? I checked data quality first, then compared 5,455 vs 7,428 children across 16 indicators with Fisher's exact tests (Bonferroni-corrected)…