w e i g h t e d a v e r a g e
The weighted average is one of the unsung heroes of math, especially for those of us that
love conditionals. An average is great, if all the quantities can be assumed to be drawn from
the same distribution, but with a weighted average, each element gets its own story - its own
weight. Weighted averages can get a bad name from the infamous grade calculation: 25% of your
grade from your homework scores, 50% from your test scores and 25% from your final, and so on.
As the semester
was drawing to a close, I watched students figure out just how hard they needed to be studying
for the final. In truth, we use weighted averages all the time. How much money to set aside for
holiday toys? How much spaghetti to make tonight? How far can I go on this tank of gas?
Even with this pendant: you might say, "I like gemstone pendants" - a nice average
statement where your feelings about any one gemstone are approximately the same. But what if
you said, "I like garnets better than any other gemstone"? Now your feelings about
garnets are different than other gemstones, and that will bias how you select jewelry. Or
maybe you say, "I only buy cabochon gemstone jewelry" or "small jewelry pendants
don't work with my wardrobe". If I wanted
to, I could assign some numbers to these feelings - these biases - and voila, we could
have a jewelry selection algorithm that could quantify how likely you are to buy this necklace
compared with another.
I hear people say they don't like math, which is too bad because
it can be a lot of fun. The next time someone says they can't do math, remind them of weighted averages.
Cost: $36.00 USD
Cost of gift shipment (domestic shipping only): $5.95 USD
m a k e i t a g i f t
s h i p m e n t :
Looking to ship this item separately as a gift? Gift shipment includes gift boxing and an occasion specific
card sent to the recipient via USPS Priority Mail. Fill out the fields below including this
jewelry item name, the recipient name and address, and occasion and this item will be
sent to the recipient with a card and note. See the gift box section
for samples of shipments with different occasion specific cards. Cost of gift shipment (domestic shipping only): $5.95 USD
c a t e g o r i e s :
- Color: red purple
- Color: neutral - light
- Material: gem rainbow
- Material: feldspars
- Type: necklace - mid
- Geek Chic: school daze
- Cool Finds: cool stones
- Something Special: workhorses