What does the Kenmore AI project measure?
Whether new data still looks like the data a model learned from. We compare the time-of-day pattern of Kenmore bus visits on Wednesday with other days. Thursday is identical, Saturday shifts a little and Sunday shifts a lot. The score used, the population stability index, also misses something a simple count spots at once.
Kenmore is a suburb where nearly every home is a separate house. Its bus stops carry 2,614 scheduled visits on Wednesday 21 October 2026, all by bus, on 10 routes numbered from 425 to 446. Weekday and weekend timetables differ, which makes Kenmore a clean example of the drift that quietly breaks AI models.
Facts last verified 12 October 2026. Teaching is online; no Kenmore branch is claimed.
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See the syllabusNumbers for the Kenmore suburb (ABS SAL31504) from its 2021 Census QuickStats, read on 12 October 2026.
| Measure | Kenmore |
|---|---|
| People | 9,675 |
| Median age | 40 |
| Families | 2,784 |
| Private dwellings | 3,566 |
| People per household | 2.8 |
| Motor vehicles per dwelling | 1.9 |
| Share | Kenmore | Queensland |
|---|---|---|
| Separate house | 92.2% (3,112) | 74.8% |
| Bachelor degree or above | 49.9% (3,761) | 21.9% |
| Professionals among workers | 40.1% (1,958) | 21.4% |
| Car as driver to work | 45.7% (2,228) | 59.5% |
Kenmore had 789 residents aged 5 to 9, or 8.2%, against 6.4% for Queensland.
Another 774 residents, 8.0%, were aged 10 to 14.
The August 2021 Census was taken during the pandemic, so the low car-to-work share may partly reflect that week.
The bureau rounds percentages and slightly adjusts small counts for privacy. We quote its figures unchanged and do not add rows to create totals.
Learners split each day's Kenmore bus visits into six time bands and treat Wednesday as the data a model was trained on. The population stability index (PSI) then scores how far each other day's shape has moved.
| Day | Before 7am | 7 to 9am | 9am to 3pm | 3 to 6pm | 6 to 9pm | After 9pm | Total | PSI |
|---|---|---|---|---|---|---|---|---|
| Wednesday | 163 | 399 | 841 | 580 | 495 | 136 | 2,614 | baseline |
| Thursday | 163 | 399 | 841 | 580 | 495 | 136 | 2,614 | 0.000 |
| Saturday | 26 | 169 | 672 | 337 | 304 | 132 | 1,640 | 0.118 |
| Sunday | 12 | 119 | 649 | 309 | 176 | 77 | 1,342 | 0.227 |
A common rule of thumb calls PSI under 0.1 stable, 0.1 to 0.25 a moderate shift and above 0.25 a large one. Those cut-offs are a convention, not a law.
Early-morning buses almost vanish at the weekend: 163 before 7am on Wednesday, 12 on Sunday. The middle of the day takes a bigger share instead.
PSI compares shares, not sizes. Saturday has 37% fewer visits than Wednesday, yet scores only 0.118. A plain count of rows catches that drop immediately.
A model trained on weekday patterns will meet weekend data. Monitoring needs at least two checks: has the shape changed, and has the amount changed? Here the simple count is the better alarm for volume.
The visit counts come from the Translink timetable feed for 21 to 25 October 2026 at stops inside the ABS outline of Kenmore. The bands, the PSI values and the percentage drop are our own calculation.
For each band, PSI multiplies the difference between the new share and the old share by the natural log of their ratio, then adds the bands together.
| Step | Learner task |
|---|---|
| 1 | Select Kenmore stop visits for each day from the feed. |
| 2 | Count visits in six time bands and convert to shares. |
| 3 | Write a psi(expected, actual) function and test it on Thursday. |
| 4 | Add a volume check and decide which alarm fired first. |
Thursday makes a perfect unit test: its bands match Wednesday exactly, so a correct function must return zero. Learners also try moving the band edges and see that the score changes with them, another reason not to treat 0.25 as magic.
Compare two bar charts of a school day and a weekend, and say what changed.
Code PSI in Python and chart it for every day of the feed.
Set up drift and volume monitoring for a model or report at work.
Details from the Translink feed for Wednesday 21 October 2026 and the Queensland Department of Education.
Stops on Moggill, Brookfield and Cedarleigh roads all carry the Kenmore Village name in the feed.
No railway station lies inside the outline, and all 2,614 Wednesday visits at its 57 stop records are by bus.
Queensland state schools start on Wednesday 27 January 2027 and Term 1 ends on Thursday 25 March.
Outline used
Kenmore is the ABS suburb outline of about 5.59 square kilometres. Stops are matched to it by our own point-in-polygon test; Kenmore Hills is a separate suburb and is not included.
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An AI model learns patterns from past data. When the data changes, as Kenmore's buses do every weekend, the model keeps answering confidently with old patterns.
Learners who have computed PSI by hand know what a drift alert means, and also what it ignores. That makes them better at choosing checks than anyone who only reads a dashboard.
Kenmore learners study AI as a system to test, not a box to trust. The longer argument is in why coding is still worth learning this year.
Lessons run live over video, so learners join from home.
The teacher leads, questions and reviews code during every lesson.
Classes follow the Queensland terms and stop in school holidays.
A free first lesson, then a written recommendation.
Groups of fifteen to twenty, or private lessons.
Two lessons a week, around eight a month.
A 4:30pm Kenmore lesson is noon in India throughout the year.
Queensland clocks
The IANA time zone database shows that Queensland's last daylight saving ended in March 1992, so the gap to India is always four and a half hours.
One set of fees for every learner.
Lesson one is free and comes with a plan.
Groups: about eight lessons a month, fifteen to twenty learners.
One to one: about eight lessons a month with a dedicated teacher.
Kenmore fees are in US dollars and only start after the trial has set the course and a weekly time. The pricing page sets out holiday and missed-lesson rules.
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Tell us the learner's age and interests. A child might compare charts of busy and quiet days; a teenager might code the Kenmore drift check.
Questions from Kenmore parents and adult learners.
The 2021 Census counted 9,675 people in the Kenmore suburb, with a median age of 40.
A score that compares how a quantity is spread across bins in two data sets. Zero means identical shares; larger values mean the shape has shifted.
A change in the data a model sees after training, such as weekend patterns reaching a model built on weekdays.
No. It ignores changes in volume and depends on how the bins are chosen, so it is paired with counts and accuracy checks.
No. Younger learners compare charts and counts; formal statistics comes in the teen and adult courses.
On Wednesday 21 October 2026 the Translink timetable shows 10 bus routes stopping inside the suburb.
No. Lessons are live online only, we have no Australian office, and our listed phone number is Indian.
The first lesson is free. Group classes cost USD 100 a month for two live lessons a week, about eight a month, in groups of fifteen to twenty, and one-to-one classes cost USD 150 a month. You agree the course and time before paying.
Fifteen to twenty learners at a similar level and pace, not sorted by age or suburb. One-to-one lessons suit anyone no group time fits.
Yes. Adults learn in their own groups or one to one, often with data from their own work.
Go to the Brisbane page for the city, the Queensland guide for the state, and AI classes for teens for secondary learners.