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How Pure Is This Cup of Joe?

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Re: How Pure Is This Cup of Joe?

#11

Post by xapata »

gwern wrote: post #7

> Finally, I used LibreOffice to tabulate and graph the data, and perform t-tests. T-tests are simple statistical tests used to determine the probability that a null hypothesis (H0) is correct. If it is less than 5% probable that the null hypothesis is correct given our data, we will reject the null hypothesis and consider our alternate hypothesis (HA) to be correct. Obligatory stats nerd: that's not what a p-value m…

Reverse isn't the right word here, either. Better to restate the definition: the p-value is the probability of observing the data (as represented by its aggregate statistics), under the condition of the null hypothesis.

Re: How Pure Is This Cup of Joe?

#13

Post by pasbesoin »

Need to read the article, but after recent occasional experiences with an associate's, I've been wondering whether the flavor profiles I experience with K-cup coffee servings are due to flavoring agents. The flavors have that kind of uniformity and intensity. And I am rather suspicious of their coming from a package of pre-ground coffee with a shelf life of months or years and manufactured/sold at the price point their are finding.

Re: How Pure Is This Cup of Joe?

#14

Post by btilly »

gwern wrote: post #7

> Finally, I used LibreOffice to tabulate and graph the data, and perform t-tests. T-tests are simple statistical tests used to determine the probability that a null hypothesis (H0) is correct. If it is less than 5% probable that the null hypothesis is correct given our data, we will reject the null hypothesis and consider our alternate hypothesis (HA) to be correct. Obligatory stats nerd: that's not what a p-value m…

My biased opinion is that the only reason why p-values are popular is that it is a concrete question whose answer can be confused with the impossible question that we really want an answer to.

If you object to the confusion, you've just taken away the main reason why it is popular.

Re: How Pure Is This Cup of Joe?

#15

Post by gwern »

xapata wrote: post #11
gwern wrote: post #7

> Finally, I used LibreOffice to tabulate and graph the data, and perform t-tests. T-tests are simple statistical tests used to determine the probability that a null hypothesis (H0) is correct. If it is less than 5% probable that the null hypothesis is correct given our data, we will reject the null hypothesis and consider our alternate hypothesis (HA) to be correct. Obligatory stats nerd: that's not what a p-value m…

Reverse isn't the right word here, either. Better to restate the definition: the p-value is the probability of observing the data (as represented by its aggregate statistics), under the condition of the null hypothesis.

I say 'reverse' because that's what it is formally: confusing P(data|null) with P(null|data). It reverses the conditional probability.

Re: How Pure Is This Cup of Joe?

#16

Post by [deleted] »

BugsJustFindMe wrote: post #3

[edit] Here's a photo of the back of a bag of his "reference" Trung Nguyen S blend. It explicitly says that it has flavorings in it, including "coffee flavor". Omfg. https://imgur.com/a/KeSYq --- I guess the guy had fun, but the conclusion is a few giant leaps away from the actual results. Many of his decisions and assumptions were entirely arbitrary, not well substantiated, and lacking just about anything approachin…

[deleted]

Re: How Pure Is This Cup of Joe?

#17

Post by xelxebar »

BugsJustFindMe wrote: post #3

[edit] Here's a photo of the back of a bag of his "reference" Trung Nguyen S blend. It explicitly says that it has flavorings in it, including "coffee flavor". Omfg. https://imgur.com/a/KeSYq --- I guess the guy had fun, but the conclusion is a few giant leaps away from the actual results. Many of his decisions and assumptions were entirely arbitrary, not well substantiated, and lacking just about anything approachin…

Should be using the ISO Standard Coffee :)

ISO 24114:2011 https://www.iso.org/standard/44704.html

Re: How Pure Is This Cup of Joe?

#18

Post by TheGrassyKnoll »

BugsJustFindMe wrote: post #6
justesjc wrote: post #5

Earlier quoted context omitted.

Why stomp all over somebody's fun? I enjoyed reading it.

Because awareness of the gap between measurement and conclusion might just be the most important thing in the world, and people and governments fail spectacularly at it all the time with significant lasting effects on society.

The price of Bitcoin ?

Re: How Pure Is This Cup of Joe?

#19

Post by coconut_crab »

I thought the rumour here says that the fake coffee is made of roasted soybean (to add bulk), quinine (bitter), gelatin (thickness), not ready made artificial flavourings as was tested in the article. Although I highly doubt that there is no coffee content in street vendor shop, as it doesn't make sense financially (Vietnam is the 2nd largest coffee producer), so the rumour is the same as "Chinese plastic rice" or "Chinese fake eggs" IMO.

Re: How Pure Is This Cup of Joe?

#20

Post by bhouston »

trisimix wrote: post #4

You should test the major chain coffees

I wonder what McDonald's uses to flavor their coffee. In Canada it has a very distinct taste unlike any coffee I've had. It can not be pure coffee in my opinion.

It claims it is 100% Arabica beans but it is so consistent and distinct. I wonder I fit does the 100% pure orange juice "trick" by processing parts of the Arabica beans into flavor chemicals and reading it.

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