Statistical irrelevance

[Slioch]

Went for a long ride today.
When I planned it on "Ride With GPS" earlier in the week it came up as 105.3 miles.
When I actually rode it today, my Cateye Mity 8 registered it as 105.7 miles.
That's a statistical variance of 0.3799%.

(For anybody under the age of 30 reading this, a Cateye Mity 8 has a wire that connects the computer thingy on the handlebars with the sensor gizmo down on the front fork. No Garmin GPS twattery for me )

 

[Fab Foodie]

And?

 

[Slioch]

Afraid there is no "and"....
I was merely "struck" by the similarity of the result between two separate pieces of technology.
Plus I'm bored and I can't watch anything decent on the telly like a Batman film because the misses is hogging Netflix watching some hideous american drama series and I've got to go to work tomorrow and the cat wants feeding again....
Sorry!

 

[StuAff]

You might want to edit the thread title....variance, not irrelevance

 

[Vapin' Joe]

The sensor is below the computer so the current has to travel uphill and is therefore slower. The GPS signal falls from a satellite so will speed up on the way down. There for the true distance is between the two figures shown.

FACT

 

[winjim]

I'm afraid that to get any meaningful statistics you need to do the exact same ride maybe a hundred times over to collect enough data for comparison. Off you go.

 

[Slioch]

You might want to edit the thread title....variance, not irrelevance

No, it's definitely irrelevance, as @Fab Foodie immediately spotted.

 

[Slioch]

I'm afraid that to get any meaningful statistics you need to do the exact same ride maybe a hundred times over to collect enough data for comparison. Off you go.

Good point. I'll get back to you soon

 

[Sharky]

Statistics prove that figures can show anything



As my old maths teacher used to tell us.

 

[bruce1530]

Statistics prove that figures can show anything

Statistics prove that the vast majority of the population have more than the average number of legs.

 

[Spinney]

Statistics prove that the vast majority of the population have more than the average number of legs.

Not quite - the vast majority have more than the mean number of legs, and also more than median number of legs, but have exactly the modal number of legs.

 

[bruce1530]

Well, if you interpret “average” as being the mean - which is the common way to interpret it - then my statement is correct :-)

 

[Shut Up Legs]

83% of statistics are just invented.
As for the Garmin GPS twattery, I wonder if that explains Garmin's poor tech support: do they just regard their customers as twats?

 

[burntoutbanger]

I read a report that stated 78% of statistics are made up on the spot, don't know how true that is.

Edit Beaten to it by Shut up legs.

 

[Spinney]

Well, if you interpret “average” as being the mean - which is the common way to interpret it - then my statement is correct :-)

This wouldn't be cyclechat if people didn't pick nits!