By using this site, you agree to our Privacy Policy and our Terms of Use. Close

Forums - Microsoft - Square Trade reports on Xbox failure rates...

theprof00 said:
heruamon said:
theprof00 said:
I would say Squaretrade is just as reliable as GI.

A poll of an unknown portion of gamers has just about the same significance as an unknown portion of customers seeking repairs from one company. I would say neither are reliable for this discussion, but that they are reliable in that they are being honest about their results.
It's just that neither one has any numbers that mean anything.


You really think a phone poll is as accurate as an engineering repairs facilities failure report...ROFLMAO...nothing else needs to be said.

although I always expect you to have some important information to contribute to the arguments, the fact of the matter is that niether can be taken by themselves.

Polling is part of nearly every statistical research, and polls have been proven to be exceptionally accurate. However, they are never good indicators of anything without additional information, and can even be used incorrectly to prove things that aren't true.

Of course, one warranty company's failure report in no better. I don't think that they are reporting incorrectly, but as any good researcher knows, you can't always take the word of a person who has something invested in the stats. The other thing every good researcher knows, is that every graph and statistic must be taken along with all additional information. Here we have no other information. We don't know how long these warranties last, we don't know what types of errors were reported, we don't know if this is an internal or external report. We don't know anything, and for you to say definitively and with excessive verve, that one company is more reliable than another, using evidence that I've shown to be exceedingly unsupported on both sides, is ignorant.

To really drive home my point, these two examples make a better case when used together, than when used separately.

On the other hand, lots of professionally used statistics use nothing but phone polling. In fact, VGC uses a type of polling to find it's numbers. There are no professionally used statistics though, that gather information from only one company. Especially not one that has vested interest in the service, and is only one of the companies involved. THat's like reporting a president as having won an election when only polling people from one state.

 

Sampling from empirical data can't be compare to a phone poll, man.  I'm sorry, but it can't!  Exit polls on Election Day are far more accurate than cold calls over a wide geo area...I'm no statistician, but I’ve seen enough statistics to know that GI's "survey" was completely wonky…what were their controls?!?  Square trade is not polling, they are reporting empirical data, and you can extrapolate as you like from that.



"...You can't kill ideas with a sword, and you can't sink belief structures with a broadside. You defeat them by making them change..."

- From By Schism Rent Asunder

Around the Network

Dude, you're the one that said to take it with a grain of salt!

I'm not saying either one is better than another. I'm saying there are big problems with each. People lie on polls and companies shift data around. They are equally fallible.

One thing I know from experience, is that most warranty companies tell customers to send the product to the manufacturer first. This most happens when warranty costs start eating all the profit. They sell the warranty to provide ease and help, but when all is said and done, warranties are devised to make pure profit margin with no product. What kingofwales said could very well be true. At first ST was taking in the repairs, but then got in a crunch.

There ARE companies that use cold calling very effectively. I'm pretty sure gallup does. Anyways, like I said, neither is reliable information.
This graph, in fact, is meant to show how jaspers are better than previous chipsets. Knowing that, this graph can't in good measure, be used to show anything else. Especially when the chipset performance is shown on the graph as a projection.

EDIT: just noticed that the performance is actual, not a projection. That was meant to be another nail in the coffin and is not really necessary to my point.



I'm confused, they just said that the Xbox 360 never went over 10% failure rate?



Battlefield Bad Company 2 > Modern Warfare 2

NicholasCage said:
I'm confused, they just said that the Xbox 360 never went over 10% failure rate?


That's what I gathered.



no, they said, it never went over 10% failure rate depending on the time when they bought the system. There's a big difference. A difference why these graphs aren't very dependable.

Not more than 10% came from any specific quarter, except maybe that spiked one. This graph doesn't differentiate total repaired from total bought. It differentiates failure rates from other failure rates.



Around the Network

As an example,
If you sell 20 360s each day of the week and 5 crash from each of those days, then only
5 out of 140 came from monday, or 3.5%. However, on that monday, and everyday, the rate is actually 25% (5/20)

EDIT: or you can subtract all repaired consoles from the pool 140-30 (leaving out any specific days value of 5)=110, to get 5 out of 110 or 4.5%

But like I said, we don't know what method they used exactly.



NicholasCage said:
I'm confused, they just said that the Xbox 360 never went over 10% failure rate?

No...it was 23.7% failure rate for their warranty customers (the total systems repaired were 16k), but the also pointed out that some of their customer when directly to M$, so the rate could be as high as 35%...based on exchanges with them.  BTW, I have a 3 year warranty for my 360...M$ only covers RROD and E74 now...not disc failure or others, so I got it. 

You've got 3 variables...failure rates...and 16000 systems.  One of you guys who are still in college do the math...better yet...high schoolers should be able to figure it out.



"...You can't kill ideas with a sword, and you can't sink belief structures with a broadside. You defeat them by making them change..."

- From By Schism Rent Asunder

eh, that's going to be hard to figure out without knowing exactly how many were sent to MS.

SO then 23.7%=16k? So they cover roughly 70k units out of 10M? It also doesn't take into account people who simply sent in their consoles (to MS) without consulting ST first.

And yes, none of us college folk are going to do this work. We have more than enough to do as it is lol. Most high schoolers don't know how to deal with people of the opposite sex yet, so they should have more free time to do stuff like this,



theprof00 said:

eh, that's going to be hard to figure out without knowing exactly how many were sent to MS.

SO then 23.7%=16k? So they cover roughly 70k units out of 10M? It also doesn't take into account people who simply sent in their consoles (to MS) without consulting ST first.

And yes, none of us college folk are going to do this work. We have more than enough to do as it is lol. Most high schoolers don't know how to deal with people of the opposite sex yet, so they should have more free time to do stuff like this,


Pssst...hey...it's 3 VARIABLES...16000 units total...so it can be partially solved with Calculus..set the equation to zero...etc...



"...You can't kill ideas with a sword, and you can't sink belief structures with a broadside. You defeat them by making them change..."

- From By Schism Rent Asunder

I don't wanna do any more maaattthhhhh *crying*

I'm going to bed..

we have the number fixed :16k
we have the total number insured: 70k

I think setting the equation to zero is more algebraic though, not cal. Although cal is algebra. It doesn't require cal knowledge to do. So yes, let's get a high schooler to do this, or we can just use their estimated number of ~34% and find a distribution. Although this 34% might already be one or two standard deviations up. I think they know their math, so I'm going to say they've seen something like a 29% total failure rate over those years with a standard error 2-3%, and a certainty (or whatever it's called) of 67%+ (based on the sample size vs total size). But there is probably a lot more we can find from that. I'm not willing to do 10 minutes of work to figure it all out though, especially if they don't themselves know the total failures.