[gradebook2-dev] Question about course grade calculation (# of decimal places)

[Jim Mezzanotte]

Thanks again Thomas. That's what I thought, but I just wanted to confirm.

Best,
Jim




On Thu, Apr 5, 2012 at 3:03 PM, Thomas Amsler <tpamsler at ucdavis.edu> wrote:
>> Tool version may be an issue here, since the school is on 1.4.1.
>>
>> One question--I didn't realize the tool employed such precision when
>> calculating grades. But when you say "use a scale up to 50 decimal
>> places," are you referring to the cutoffs for grade ranges in grade
>> scales, or just the precision used for the display of a calculated
>> grade? (before the round, of course)
>
> The 50 decimal places are used to carry precision for all
> calculations. When we display and compare grades, we use two decimal
> places.
> -- Thomas
>
>>
>> Best,
>> Jim Mezzanotte
>> rSmart
>>
>> On Wed, Apr 4, 2012 at 6:42 PM, Thomas Amsler <tpamsler at ucdavis.edu> wrote:
>>> Please see inline comments below:
>>>
>>>
>>> On Wed, Apr 4, 2012 at 11:48 AM, Jim Mezzanotte <jmezzanotte at rsmart.com> wrote:
>>>> Hi all,
>>>>
>>>> I'm trying to determine how many demical places Gradebook2 uses when
>>>> calculating course grades.
>>>>
>>>> When you're entering scores (in points) for an item, you can enter up
>>>> to five decimal places, yet the tool only displays to two decimal
>>>> places.
>>>
>>> That's correct. Please not that all gradebook2 calculations use a
>>> scale up to 50 decimal places. The final numeric grade is then rounded
>>> to two decimal places.
>>>
>>>>
>>>> One of our clients is using a custom final grade export integration
>>>> with Banner. They noticed that, while course grades display to only
>>>> two decimal places both in Banner and in the tool, the export files
>>>> display to three decimal places.
>>>
>>> What version of gradebook2 are they using? The latest version should
>>> round the calculated grade to two decimal places in the export file.
>>>
>>>>
>>>> I'm assuming the export is exposing what Gradebook2 does behind the
>>>> scenes--that is, the tool calculates course grades to three decimal
>>>> places, and then it rounds to display only two decimal places. Thanks
>>>> in advance if anyone can confirm, this is how the tool calculates
>>>> course grades?
>>>
>>> As mentioned above, it uses 50 decimal places to do all calculations
>>> and then rounds it to two decimal places. I think in older gradebook2
>>> versions, the displayed "Calculated Grade" wasn't rounded for display
>>> purpose.
>>>
>>> -- Thomas
>>>
>>>>
>>>> Best,
>>>> Jim Mezzanotte
>>>> rSmart
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