Google Advanced Data Analytics case studies
Google Advanced Data Analytics · Put your knowledge to work in context.
This independent study page provides practice for Google Advanced Data Analytics. Its editorial learning areas include Data projects, communication and accountable business value; Python and dataframe reasoning for applied analytics; Statistical inference, regression and model assumptions; Intelligent search, learning and evaluation; Data, Databases, and Information Retrieval; Identity, access and cryptographic protection. The Google Advanced Data Analytics case studies are 6 cases and about 2,147 words.
1A statistically visible change does not answer the decision alone
A fictional project compares an operational metric before and after a pilot. The supplied analysis finds a small statistically significant difference, but it also records implementation cost, additional review work and uncertain representativeness of the pilot users.
166 words, under 1 min2A duplicate join key doubles the reported total
A fictional analyst joins transaction rows to a customer-classification table. The supplied classification data contains two records for one customer key, even though the analyst intended one current classification per customer.
170 words, under 1 min3A training score hides the evaluation boundary
A fictional team reports a strong model score after selecting features and preprocessing values using the complete dataset, including records later labeled as the test set. The final evaluation is described as independent because the model was not directly fitted to those test labels in its last training call.
174 words, under 1 min4The Slow Catalog Query
A public library's catalog database has 2.4 million rows in a table with columns id, title, author, year, subject, and checked out. The web catalog runs this query about 40 times per second: SELECT id, title FROM books WHERE author = ?
613 words, about 3 min5Candidate Records at East Mercia Examinations Board
East Mercia Examinations Board stores records for 25,000 candidates. Each record contains an 8-digit candidate number, a 60-character name, and nine paper marks that are integers from 0 to 100.
803 words, about 4 min6SaaS access after a role change
A fictional organization uses a managed collaboration service for internal planning documents. The provider maintains the application and underlying servers, while the organization configures users, groups and sharing settings.
221 words, about 1 min