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"The Problem with Angels" by Cyndy Dowling

Although this problem is wholly mine, The catalyst came from the magazine, Time.On the magazine cover I did find The realm of angels tickling my mind. Inside, 69% I found to be In angels, Americans do believe. Then, it was time to rise to the task, Ninety-five high school and college students I did ask.Viewing all as one group, Random sampling to get the scoop. So, I asked each to be true, "Do you believe in angels?" Tell me, do! Hypothesizing at the start, Totally believing in my heartThat the proportion who said yes Would be equal on this test. Lo and behold, seventy-three did arrive, Out of the sample of ninety-five.Now your job has just begun, Solve this problem and have some fun.
  • 1.65
  • 0.0984
  • Decision: Do not reject null
  • ( 0 . 6836 , 0 . 8533 ) size 12{ \( 0 "." "6836",0 "." "8533" \) } {}

"Blowing Bubbles" by Sondra Prull

Studying stats just made me tense, I had to find some sane defense.Some light and lifting simple play To float my math anxiety away. Blowing bubbles lifts me high Takes my troubles to the sky.POIK! They're gone, with all my stress Bubble therapy is the best. The label said each time I blew The average number of bubbles would be at least 22.I blew and blew and this I found From 64 blows, they all are round! But the number of bubbles in 64 blows Varied widely, this I know.20 per blow became the mean They deviated by 6, and not 16. From counting bubbles, I sure did relax But now I give to you your task.Was 22 a reasonable guess? Find the answer and pass this test!

21. "Dalmatian Darnation" by Kathy Sparling

A greedy dog breeder named Spreckles Bred puppies with numerous frecklesThe Dalmatians he sought Possessed spot upon spotThe more spots, he thought, the more shekels. His competitors did not agree That freckles would increase the fee.They said, “Spots are quite nice But they don't affect price;One should breed for improved pedigree.” The breeders decided to prove This strategy was a wrong move.Breeding only for spots Would wreak havoc, they thought.His theory they want to disprove. They proposed a contest to Spreckles Comparing dog prices to freckles.In records they looked up One hundred one pups:Dalmatians that fetched the most shekels. They asked Mr. Spreckles to name An average spot count he'd claimTo bring in big bucks. Said Spreckles, “Well, shucks,It's for one hundred one that I aim.” Said an amateur statistician Who wanted to help with this mission.“Twenty-one for the sample Standard deviation's ample: They examined one hundred and one Dalmatians that fetched a good sum.They counted each spot, Mark, freckle and dotAnd tallied up every one. Instead of one hundred one spots They averaged ninety six dotsCan they muzzle Spreckles’ Obsession with frecklesBased on all the dog data they've got?
  • -2.39
  • 0.0093
  • Decision: Reject null
  • ( 91 . 854 , 100 . 15 ) size 12{ \( "91" "." "854","100" "." "15" \) } {}

"Macaroni and Cheese, please!!" by Nedda Misherghi and Rachelle Hall

As a poor starving student I don't have much money to spend for even the bare necessities. So my favorite and main staple food is macaroni and cheese. It's high in taste and low in cost and nutritional value.

One day, as I sat down to determine the meaning of life, I got a serious craving for this, oh, so important, food of my life. So I went down the street to Greatway to get a box of macaroni and cheese, but it was SO expensive! $2.02 !!! Can you believe it? It made me stop and think. The world is changing fast. I had thought that the average cost of a box (the normal size, not some super-gigantic-family-value-pack) was at most $1, but now I wasn't so sure. However, I was determined to find out. I went to 53 of the closest grocery stores and surveyed the prices of macaroni and cheese. Here are the data I wrote in my notebook:

    Price per box of mac and cheese:

  • 5 stores @ $2.02
  • 15 stores @ $0.25
  • 3 stores @ $1.29
  • 6 stores @ $0.35
  • 4 stores @ $2.27
  • 7 stores @ $1.50
  • 5 stores @ $1.89
  • 8 stores @ 0.75.

I could see that the costs varied but I had to sit down to figure out whether or not I was right. If it does turn out that this mouth-watering dish is at most $1, then I'll throw a big cheesy party in our next statistics lab, with enough macaroni and cheese for just me. (After all, as a poor starving student I can't be expected to feed our class of animals!)

Questions & Answers

so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Collaborative statistics (mt230 - fall 2014). OpenStax CNX. Aug 16, 2014 Download for free at http://legacy.cnx.org/content/col11403/1.7
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