I applied some data analysis concepts to a dataset obtained from Tau Beta Pi HQ.
gain a better understanding of the Texas Gulf Coast Alumni Chapter of Tau Beta Pi’s constituency
determine parts of town where events might be hosted to achieve greater turnout
Data was received in .XLSX format, so I naturally gravitated towards Microsoft Excel for data analysis.
I constructed a series of PivotTables to gain insight about the geographical distribution of the alumni chapter’s constituency.
Prior to mapping, I filtered to count only those entries that have an email address, yielding 2682 out of 9127 records. My focus is on those members that have provided their email addresses: without external support, it will be challenging and expensive to reach out to the broader population.
I discovered OpenHeatMap (GitHub) while searching for a tool that would easily map entries from a CSV file. Thanks to Pete Warden for producing OpenHeatMap.
Tested the effect of cleaning ZIP code data, stripping any ZIP+4 codes back to five-digit ZIP codes.
Some members list their work address instead of their home address, resulting in inflated counts from some parts of the city (namely downtown and Rice University)
OpenHeatMap did not correctly resolve all ZIP codes
20170222 I learned of Google FusionTables, which can be used to generate heatmaps and much more. Beginning further analysis to see how this tool might be used. So far I have observed the Google Maps Geocoding service used by FusionTables to be rather slow – perhaps it’s single-threaded?
Unfortunately, the heatmaps generated by Google FusionTables show only 1000 rows of data. Additional limitations are listed here.
The Purple company made some bold claims about their Purple mattress and caught my attention with their viral Raw Egg Test video. I invested significant time into researching the company, its history, and its technology until it became impossible to ignore the potential that a Purple mattress could offer.
I ordered a Purple mattress with the intention of putting their marketing messages to the test through objective data capture and statistical analysis.
Initially I wanted to share this data as soon as I had a significant number of points to present, but held off on publishing until now.
I wanted (still do!) to become a Purple affiliate, but found their affiliate program manager unresponsive, even when pressed for feedback on how to bolster my application. I’m hoping that this situation improves after I get the right eyes on this piece.
I hope you enjoy the review – I’ll respond to comments left below.
Purple Mattress Value
What’s a good night’s rest worth to you?
$1,299 for Purple king-size mattress
10 year life (warranty)
365.25 days in a year: low side 3652 days in ten years
$0.356 / day
Purple Mattress Price Analysis
The table below shows how much it’ll cost you to sleep on a Purple mattress of your own, assuming a ten-year mattress lifespan:
King / Cal. King
Cost / Day
0% APR financing (6 months) is available for qualified consumers through Affirm (onpurple.com/financing), and Purple’s generous 100 night trial and return period make the Purple mattress an obtainable, low-risk investment.
While not exactly ‘pennies a day,’ the price for better sleep is not too high, especially when compared against similar mattresses offered by Purple’s direct competitors, like intelliBED.
Order Placed for One Purple Mattress
I placed an order for a Purple mattress in the early morning of August 31st, 2016. Purple’s 100 night trial helped – with the option to donate the Purple mattress to charity, I knew that in the worst case scenario, someone else would have a Purple mattress to sleep on. In the best case, I’d wake up each morning a new man.
I had high expectations for the mattress. The strong social proof helped: with glowing reviews, “this many people can’t be wrong!” Aside from that, the time that I spent familiarizing myself with the Purple company, their intellectual property, and their products (like the Royal Purple Seat Cushion) all led me to believe that I was in for a treat.
The order confirmation email and Purple website both suggested that it’d be about two weeks before I heard back regarding the status of my order.
In the early hours of September 6, I was a little peeved to find that I’d been charged for the order prior to shipping, but I was willing to let it slide. Then, at 8:41AM of that same day, I received notification that my order had shipped. Not bad! Purple set expectations at two weeks, and filled my order in one.
The Mattress Arrives
My Purple mattress arrived on September 9. The UPS courier delivered it to my front door.
Unfortunately, the AC downstairs at my home had stopped working. The compressor fan wasn’t spinning up, but I was able to straighten it out early September 10.
On the morning of September 10, I moved the mattress out of the doorway, and into my bedroom. I worked alone. I started by pulling my old mattress off of the box spring, and propping it against the wall. I positioned a mover’s dolly beneath the rolled-up Purple mattress, and gently positioned it upon the box spring. Within the packaging, I found a leaflet with a URL (onpurple.com/unroll), where I was able to watch a short video showing how to unroll the mattress. I referenced it to get a clear picture of the orientation that the mattress had been packaged in, though I could have figured this out by grabbing a tape measure.
Enzo came by to see about some boxes, and I shared my excitement over the new mattress, inviting her to play with the enclosed samples of Purple material. She helped me a bit, and lay down on the mattress after we got it righted, exclaiming that it felt great.
The pamphlet also contained two Purple-branded sleep masks, a nice touch.
First impressions: it’s a lot more cushioned than the mattress that it may be replacing, and the one that I slept on before I fixed my A/C downstairs.
I didn’t realize how old the mattress that I had been sleeping on was. It’s a Bassett DreamMaker Chiropractor, produced in July 1991. A funny aside: when I brought up the Purple mattress in a conversation with my parents, they insisted that they had purchased quality mattresses – I had no doubt that the mattress was once decent, but it’d long-exceeded its useful life.
Purple Mattress Composition
Each Purple mattress is composed of the following:
2″ Hyper-Elastic™ Polymer
3.5″ HD Medium-Soft Comfort Foam
4″ HD Medium-Firm Support Foam
Objective Sleep Data
Objective sleep data was collected with my Misfit Shine activity tracker (MSRP $69.99, Amazon.com). It tracks the time at which I begin to sleep, my total sleep time, time spent awake (going to the bathroom in the middle of the night!), light sleep, and restful sleep.
Raw sleep data is provided at the end of this review 🙂
To put Purple’s claims of better quality sleep to the test, I took the ratio between restful sleep and total sleep as a measure of sleep quality. I cleaned the data of any nights that I spent away from home prior to further analysis.
The cleaned data was used to produce the charts and descriptive statistics given below.
This scatter plot shows sleep quality across all nights. The vertical line indicates the night that I began sleeping on the Purple mattress, September 10th, 2016.
This histogram shows the distribution of sleep quality across those nights that I spent on the Purple mattress:
The accompanying table provides descriptive statistics of those nights:
This histogram shows the distribution of sleep quality across those nights that I spent on my old mattress:
The accompanying table provides descriptive statistics of those nights:
Results from t-test follow
t-Test: Two-Sample Assuming Equal Variances
Hypothesized Mean Difference
t Critical one-tail
t Critical two-tail
t-Test: Two-Sample Assuming Unequal Variances
Hypothesized Mean Difference
t Critical one-tail
t Critical two-tail
The t-stat passes the test for significance, indicating a statistically significant difference between the average sleep quality that I experienced sleeping on my old mattress and the Purple mattress.
Noteworthy Nights with My Purple Mattress
9/10 – First night: So excited to try out the new mattress that I wish I had fewer tasks to work on. Didn’t sleep too well, mostly because my mind was so active.
9/11 – Second night: I slept for twelve hours. Misfit showed light sleep vs. restful sleep to be almost 50:50, which I don’t think I’ve ever gotten before
9/12 – Third night: No data from Misfit, but woke up feeling good
9/18 – Had difficulty falling asleep (mind in overdrive) – ended up sleeping on my side as opposed to my back
9/21 – First time falling asleep while it was dark out since the launch of Destiny: Rise of Iron. Before bedtime, I set an alarm to wake me in a couple of hours. Misfit Shine failed to capture that brief moment that I woke up and disabled the alarm before returning to sleep. Otherwise, noteworthy because I surpassed 50% restful sleep to total sleep.
Results & Closing Remarks
The difference in means is 0.097711, giving us a 27.1% improvement in sleep quality from my old mattress! I was able to experience the best sleep of the past few months thanks to the Purple mattress.
My personal thoughts on the mattress: I wish I could keep it, but it’s simply not the right time for me. I’ve got to come out of retirement, first. Consider this a step in the right direction.
That being said, quality sleep is priceless, and the Purple mattress may be an improvement over your existing mattress. With a generous 100 night trial and return period, you owe it to yourself to give it a try! Use this link to navigate straight to the mattresses section of Purple’s website 🙂
The Purple mattress provided me with measurably higher quality sleep than my old mattress, and I’m going to miss it.
I was excited to receive shipment of my Royal Purple Seat Cushion (MSRP $79.99, Amazon.com). Neil ordered one from Purple’s official website on July 18, the same day that I ordered mine from Amazon. Mine arrived on July 20 (well before his!) thanks to Prime Two-Day Shipping.
I chose this particular cushion because of its thickness – at 2 inches, it’s as thick as the hyper-elastic polymer layer on the Purple mattress. As such, my seat-time on the Royal Purple Seat Cushion granted me a great sense of how the Purple mattress would perform.
I was surprised by how heavy the package was – Purple puts the approximate weight of the Royal Purple Seat Cushion at 5.4 lb. With the cushion cover in place, my postal scale gives a reading of just over 5.5 lb.
The cushion ships in retail packaging, complete with carry handle. A clear window shows off the configuration of the hyper-elastic polymer cushioning material. A small, round cutout invites prospective buyers to touch the gel material.
Purple company branding appears in the top left of the packaging
The Royal Purple™ Seat Cushion
The World’s First Go Anywhere, No-Pressure Seat Cushion
Washable cover included
The Ultimate Cushioning Experience
Purple™ is the most advanced cushioning material available on Earth. Made from a patented Hyper-Elastic Polymer™, Purple provides comfortable support while eliminating pressure spikes.
As pressure increases on the cushion, Purple columns buckle, distributing weight to neighboring columns and virtually eliminating uncomfortable pressure points – even allowing you to sit on an egg without it breaking (although we’re not sure why you’d want to).
Once unboxed, I noted the wondergel tag on the cushion cover – they must have been getting rid of old stock! I followed the instructions to slip the cushion into its cover, eager to get on it.
The Royal Purple Seat Cushion cover is made of slick black fabric, and has small bumps on the bottom. It features a woven carry handle on the edge facing the seat back.
Impressions from Usage
The buckling columns of hyper-elastic polymer used in the Royal Purple Seat Cushion are remarkably supportive. I have some chairs at home that used to put my legs to sleep every time, but with the Royal Purple Seat Cushion supporting me, I no longer experience that uncomfortable sensation.
With the Royal Purple Seat Cushion on my task chair, my newly elevated seating position meant that I had to make a few minor adjustments to my computer setup. I had to tilt my secondary display upwards in order to view it comfortably.
I became so enamored with Purple that, for a brief time, I shared the Raw Egg Test video with everyone I had the opportunity to speak with. I invited a couple of friends to give the Royal Purple Seat Cushion a try:
William F. really liked it. He’s a big man, weighing in at around 300 pounds. He got comfortable with it, and now I make sure to offer him the cushion whenever he drops by for a visit!
Edwin C. really liked it as well. He’s worked in human healthcare before, and was impressed when I told him that the same cushioning technology had been licensed by Stryker Medical for use in hospital beds
I highly recommend a Purple seat cushion for anyone who spends a fair amount of time sitting in any given day. It can transform an uncomfortable chair for the better.
Purple says it’s for office heroes, long-haul drivers, authors, artists, and CEOs. I don’t know about all that, but it’s definitely an excellent cushion, and it gave me great confidence in the efficacy of EdiZONE’s cushioning technology. So much, in fact, that I ordered a Purple mattress!
You can buy a Royal Purple Seat Cushion now on Amazon.com and support my website in the process! Try one out for yourself 🙂
My interest in Purple was kindled after I saw the Purple raw egg test video. I began researching the company, its background, and its technology, ultimately ordering a Royal Purple Seat Cushion for myself.
Early on, I wondered whether Purple would release a mattress topper, thinking that such a product was bound to be a hit.
History suggests that the answer is a decisive yes, based on the market segmentation strategy employed by intelliBED, a company that brought products to market in the past using EDiZONE’s technology, as well as Purple’s approach to the market.
Furthermore, Purple have referenced a mattress topper in their indiegogo campaign, their FAQ, and in their Purple Product Registration form.