Today: Inquiry 2 and Lab Safety...

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Today Inquiry 2 and Lab Safety...
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• Why use a sample instead of a population?
• Logistics
• Cost
• Time

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Samples Random- each member of population has an
equal chance of being part of the
sample. or Representative- ensuring that certain
parameters of your sample match the population.
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Replicates Technical vs Experimental Technical
replicate- one treatment is divided into multiple
samples. Experimental replicate- different,
replicate, treatments are done to different
samples.
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Testing blood sugar levels after eating a
Snickers
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Testing blood sugar levels after eating a
Snickers Divide a participants blood into 3
samples and test blood sugar in each
sample. Technical or Experimental replicate?
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Testing blood sugar levels after eating a
Snickers Test 3 different people. Technical or
Experimental replicate?
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Testing blood sugar levels after eating a
Snickers Test the same person on 3 different
days. Technical or Experimental replicate?
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What sample size do you need?
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What sample size do you need? It depends on the
error you expect.
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• To determine an appropriate sample size, you need
  to estimate a few parameters.
• Means
• Standard Deviation
• Power
• The probability that an experiment will have
  a significant (positive) result, that is have a
  p-value of less than the specified significance
  level (usually 5).

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This calculator will help you determine the
appropriate sample size http//www.stat.ubc.ca/r
ollin/stats/ssize/n2.html
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What sample size do you need? It depends on the
error you expect. (So it is impossible to predict
with 100 accuracy before the experiment is
carried out.)
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• Inquiry 2 -Who?
• Groups of 3-5 people

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• Inquiry 2 -Who?
• Groups of 3-5 people
• Divide work

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• Inquiry 2 -Who?
• Groups of 3-5 people
• Divide work
• Be clear about responsibilities and expectations
• Leave enough time to get everything done without
  panic

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• Inquiry 2 -What?
• Incredibly, amazingly, fantastically, critically
  important, essential information has been posted
  on the class webpage.
• Lab Safety
• Supplies
• Order Forms
• Updated Proposal and Report Formats

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• Inquiry 2 -What?
• May use gadgets, chemicals, kits, etc
• -https//uteach.utexas.edu/direct
• -Analytical/physical chemistry storeroom(order
  form)
• -Media kitchen (via chem storeroom)
• -Research Streams

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CAS registry numbers unique identifiers for most
chemicals http//www.cas.org/expertise/cascontent/
registry/regsys.html
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Inquiry 2 -Where and When? You can work in PAI
4.14 during your scheduled lab times, and/or
during my other lab times. M 12-3pm M 3-6pm Th
12-3pm Th 330-6pm
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Inquiry 2 -Where and When? You can work during
the your scheduled lab times, and/or during my
other lab times. Outside of lab times, you may
only work when a TA is present. These times will
be posted weekly.
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Inquiry 2 -Where? Lab Safety
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• Inquiry 2 -Where?
• Lab Safety
• Closed toed shoes, sleeves, legs covered to
  knees, hair out of harms way

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• Inquiry 2 -Where?
• Lab Safety
• Closed toed shoes, sleeves, legs covered to
  knees, hair out of harms way
• NO FOOD in lab

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• Inquiry 2 -Where?
• Lab Safety
• Closed toed shoes, sleeves, legs covered to
  knees, hair out of harms way
• NO FOOD in lab
• Be aware of what you are doing ans working with

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• Inquiry 2 -Where?
• Lab Safety
• Closed toed shoes, sleeves, legs covered to
  knees, hair out of harms way
• NO FOOD in lab
• Be aware of what you are doing ans working with
• Wash hands before leave lab

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Inquiry 2 -Where? Waste Disposal You are
responsible for the safe disposal of all waste
you generate.
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Inquiry 2 -Where? Waste Disposal
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Inquiry 2 -Where? Waste Disposal You are
responsible for the safe disposal of all waste
you generate. This includes chemical waste and
biological waste.
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If you make a mistake, spill something, have an
accident tell someone immediately.
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Inquiry 2 -How? Proposal Mostly the same as
inquiry 1 2 additional parts
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Inquiry 2 -How? Proposal Mostly the same as
inquiry 1 2 additional parts In the Experiment
section Include detailed information on equipment
and reagents to be used. Where will you get
them Needed order forms
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Inquiry 2 -How? Proposal Mostly the same as
inquiry 1 2 additional parts Add a
Responsibilities sectionDescribing who will do
what
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Inquiry 2 -How? Proposal Proposals will not
be approved until sources for all equipment
and/or chemicals are secured. Orders will be
placed during lab, after your proposal is
approved.
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Inquiry 2 -How? Written Reports Similar to
inquiry 1, but add a Responsibilities section
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Inquiry 2 -How? Written Reports Similar to
inquiry 1, but add a Responsibilities
section Everyone should participate in writing,
some may write the original text, while others
work on figures/tables, and others edit.
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• Inquiry 2 -How? Oral Reports
• Should be 15 to 20 minutes long

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• Inquiry 2 -How? Oral Reports
• Should be 15 to 20 minutes long
• Include all of the basic information from the
  written report.(Do not simply read your written
  report)

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• Inquiry 2 -How? Oral Reports
• Should be 15 to 20 minutes long
• Include all of the basic information from the
  written report.(Do not simply read your written
  report)
• Everyone will present some part of the oral report

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• Inquiry 2 -How? Oral Reports
• Should be 15 to 20 minutes long
• Include all of the basic information from the
  written report.(Do not simply read your written
  report)
• Everyone will present some part of the oral
  report
• Should be visually engaging

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My group sucks, and now I am going to fail.
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Dont have a cow man.Your will be graded as
agroup and also only on your sections.
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• Inquiry 2 proposals are due in lab on Th 10/1 or
  M 10/5
• Homework 4 due nowWhat was the hardest part of
  inquiry 1, and how will you make this easier for
  inquiry 2?
• This weekend Pecan Street Arts
  Festival(http//www.oldpecanstreetfestival.com)
• Next week Research Ethics