Dan's MOT Report

Source: https://data.gov.uk/dataset/anonymised_mot_test

Data from every MOT test performed from 2005 to 2013, totalling {{ recordCount }} rows.

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Pass Rate By Age and Make

Stuff

Random Forest Confusion Matrix

The confusion matrix shows the class predicted by the model (column) versus the actual class of the sample (row).

A perfect predictor would give a diagonal green line from top left to bottom right, showing every class predicted correctly.

In this case, the random forest is attemting to predict the banded pass rate (0: 0% - 10%, 1: 10 - 20%, 2: 20 - 30%, ... 9: 90% - 100%). Since virtually no classes of vehicle exist where the pass rate is less than 40% it doesn't do very well at those levels, however, from 40% to 80% it does pretty well.

Pass rate by make

  1. {{ formatRate(make.rate) }} {{ make.make }}

Total number of records is {{ makeCount }}.

Test counts by make

Number of tests by vehicle manufacturer.

Pass rate by make and model

  1. {{ formatRate(mm.rate) }} {{ mm.make }} {{ mm.model }}

Total number of records is {{ makeAndModelCount }}.

Test counts by make and model

Number of tests by manufacturer and model.

Test counts by vehicle colour

Number of tests for vehicles of various colours.

Test counts by vehicle colour

Number of tests for vehicles of various colours.

Pass rate histogram for cars aged up to 20 years

Pass rate (%) for vehicles of ages 0 - 20 years. At around 15 years the pass rate reaches a minimum, implying that most cars don't make it to this age.

Pass rate histogram for cars aged up to 100 years

Pass rate (%) for vehicles aged 0 to 100 years. As cars get older, they are better cared for, their value increases and they are used less. This may be the cause of the higher pass rates. Note that the pass rate exceeds that for brand new cars somewhere around 60-70 years.

MOT counts by age over first 20 years

Number of MOT test records for vehicles of ages 0 to 20 years. The MOT test is not mandatory for most vehicles until they are three years old. Note that this doesn't equate to number of unique vehicles, as a failed vehicle is normally retested.

MOT count CDF by age over first 20 years

Cumulative distribution of MOT tests for vehicles of ages 0 to 20 years. The MOT test is not mandatory for most vehicles until they are three years old.

MOT counts by age over 100 years

Number of MOT test records for vehicles of ages 0 to 100 years. Note that this doesn't equate to number of unique vehicles, as a failed vehicle is normally retested.

MOT count CDF by age over 100 years

Cumulative distribution of MOT tests for vehicles of ages 0 to 100 years. The 95th percentile is somewhere around the 15 year mark..