IBM Data Science Professional Certificate case studies
IBM Data Science Professional Certificate · Put your knowledge to work in context.
The IBM Data Science Professional Certificate is a Coursera-based series of courses that introduces the full entry-level data science workflow, from methodology and Python programming through SQL, data analysis, visualization, machine learning, and a peer-reviewed capstone. It is aimed at career changers, students, and working professionals who want a structured, hands-on path into data science rather than a single proctored exam. The IBM Data Science Professional Certificate case studies are 5 cases and about 4,498 words.
1The Join That Added 3,664 Rows
Priya is assembling a quarterly revenue report. orders.csv has 48,212 rows; customers.csv has 12,040 rows and the CRM owner insists there is exactly one row per customer.
841 words, about 4 min2A 0.99 AUC That Should Not Ship
Marco's team built a churn classifier for a subscription business with 50,000 accounts; 4.2% of accounts churned during the six-month label window. The first model reported 96.1% accuracy and ROC-AUC 0.99 on a random 80/20 split.
915 words, about 5 min3The Query That Returned Zero Rows
A support analyst is asked how many customers have never placed an order. She writes: and gets 0, although the CRM export has 12,040 customers and the orders table has 210,000 rows.
907 words, about 5 min4The Dashboard That Said Occupancy Fell
A hospital operations team has shipped a bed-capacity dashboard. The tiles are: a 14-slice pie chart of discharge dispositions; a dual-axis line chart with average length of stay (0–12 days, left axis) and monthly admissions (1,200–1,500, right axis) drawn as two lines that happen to cross in July; a bar chart of occupancy by ward whose y-axis starts at 85%; and a red/green heatmap of ward-day utilisation.
900 words, about 5 min5Can We Say the Campaign Caused 12%?
Daniel's capstone team analysed 18 months of weekly sales for a mid-size retailer. In the eight weeks after a March email campaign, weekly sales were 12% higher than in the previous eight weeks.
935 words, about 5 min