I want to disagree.

>From that form, a good number of respondents don't know what engine
oil they use. They just used "Shell Helix 15W40", what you had
provided. That is called biased data collection.

It's like asking, who will be your presidential candidate in 2017.
Example "Uhuru Kenyatta". A good number of respondents don't know any
other candidate than which you have provided.

That is my hypothesis.

On 19/02/2016, Peter Karunyu via skunkworks <skunkworks@lists.my.co.ke> wrote:
> I am not a data analyst, but it seems that my hypothesis is somewhat right.
>
> I graphed the engine oil viscosity against fuel usage, and got the nice
> chart attached.
>
> Summary:
> More people use Shell Helix 15W40 than 5W40, BUT, those who are using 5W40
> are consistently getting better fuel economy.
>
>
>
> On Thu, Feb 18, 2016 at 12:20 PM, Peter Karunyu <pkarunyu@gmail.com> wrote:
>
>> I am not sure if this spreadsheet will autoupdate when new entries are
>> made, but here you go
>>
>>
>> https://docs.google.com/spreadsheets/d/1OGAaVMtqlVjWHWWXv5azf6DiaFagsnAWcgQpX3GFmQA/edit?usp=sharing
>>
>> On Thu, Feb 18, 2016 at 11:43 AM, Dennis Kioko <dmbuvi@gmail.com> wrote:
>>
>>> Please do share the results for those of us who have no data to input
>>> into the survey.
>>>
>>>
>>> On Thursday, 18 February 2016, Peter Karunyu via skunkworks <
>>> skunkworks@lists.my.co.ke> wrote:
>>>
>>>> Hey members,
>>>> I have a theory that engine oil (brand and viscosity) affects the sort
>>>> of fuel consumption one gets, therefore, to get some numbers behind
>>>> this
>>>> theory, I have created a simple, 5 question survey.
>>>>
>>>> http://goo.gl/forms/GYCuXy2VPt
>>>>
>>>> I hereby kindly request you all to take a minute or two to answer those
>>>> questions. Results are and will be freely accessible.
>>>>
>>>> Thanks!
>>>>
>>>
>>>
>>> --
>>> with Regards:
>>>

>>> blog.denniskioko.com <http://www.denniskioko.com/>
>>>
>>>
>>>
>>
>


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Mwendwa Kivuva, Nairobi, Kenya
twitter.com/lordmwesh