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**The Average**

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**Lady-Hynarc****Verified Member**- Registered: 09-04-12
- Posts: 640

I seem to recall that the DVSA figure of 46 hours plus 20 hours private practice to pass the test was as a result of a survey done some time in the early 2000's. Regardless of the accuracy of those original figures, do you think that a survey done now would come up with a higher or lower figure?

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**Triplea35****Verified Member**- Registered: 28-09-12
- Posts: 491

I understand the fiqure of 47 hours plus 20 hours private practice was a result of a survey which was published in 2008.

It's important to remember that this was 'to pass the test' so will include all further training for repeat attempts.

From schooldays ( many years ago!) I recall that there are numerous ways of calculating averages, so how were these figures calculated?

Taking out the extremes of a few slow/nervous learners, multiple attempts and super fast learners I would say my median average pupil passes first attempt after 34 hours and without private practice.

So personally I find the fiqures seem high but I do use them as a guide to parents/new learners so that the majority are pleasantly surprised/confidence boosted when they take far less.

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**pegasus****Verified Member**- From: north west
- Registered: 25-02-05
- Posts: 3,291

Hi

Averages???????

11 pupils + number of lessons each has had before passing.

10, 15, 21, 26, 31, 34, 35, 36, 42, 45, 65.

The 3 commonest types of average for our purposes are:-

Mean = add all numbers together then divide by the number of numbers.

So 324/11 = 29.54 recurring.

Median = the middle number of the group when they are ranked in order.

In the example above that would be 34 if there was an even number of numbers then the median would be the mean of the middle two numbers

Mode = The most frequently occurring number in a list. The list above does not therefore have a modal average though with more numbers added to the list maybe one of those early to mid 30s would re-occur. Of course if one of the 40s numbers should most often then that could be the mode.

This calculation gives average number of lessons per pupil.

If the pupil with 45 lessons had 2 tests and the one with 65 lessons 3 tests then the mean average number of lessons per test would be:

324/14 = 23.142, though the mean average of lessons per pass is the 29.54 recurring figure

The mean average per first time pass (all pupils) would be: 324/9 = 36

The mean average number of lessons for first time passes only would be: 250/9 = 27.77 recurring.

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