Observation Hypothesis Experiment Data Collection Conclusion Retest Observations Gathered
through your senses A scientist notices something in their natural world Observations
An example of an observation might be noticing that many salamanders near a pond have curved, not straight, tails
A suggested solution to the problem. Must be testable Sometimes written as If Then statements Predicts an outcome
Hypothesis An example of a hypothesis might be that the salamanders have curved tails due to a pollutant
in the moist soil where they live. Experiment A procedure to test the hypothesis .
Experiment Variable factor in the experiment that is being tested Experiment A good or
valid experiment will only have ONE variable! Controls and Variables Scientific Experiments Follow Rules
An experimenter changes one factor and observes or measures what happens.
The Control Variable The experimenter makes a special effort to keep other factors constant so that they will not effect the outcome. Those factors are called control variables.
What is the Purpose of a Control? Controls are NOT being tested Controls are used for COMPARISON Other Variables
The factor that is changed is known as the independent variable. The factor that is measured or observed is called the
dependent variable. Example of Controls & Variables
For example, suppose you want to figure out the fastest route to walk home from school. You will try several different routes and time how long it takes you to get home by each one. Since you are only interested in finding a route that is fastest for you, you will do the walking yourself. What are the Variables
in Your Experiment? Varying the route is the independent variable The time it takes is the dependent variable Keeping the same walker throughout makes the walker a control variable.
One more thing it is best to make several trials with each independent variable. Valid Experiments Remember: To be a Valid Experiment: Two groups are required
--- the control & experimental groups There should be only one variable Data Results of the experiment
May be quantitative (numbers) or qualitative Data Must be organized Can be
organized into charts, tables, or graphs Conclusion The answer to
the hypothesis based on the data obtained from the experiment Retest In order to verify the results,
experiments must be retested. Review Solving a Problem 1)Identify a Problem 2) State Observations about the problem
3) Form a Hypothesis about the problem (ifthen) 4) Design an Experiment to test the hypothesis 5) Collect Data 6) Form a Conclusion 7) Retest
Introduction to the Bootstrap. Makes use of a sample from a population to estimate the sampling distribution of a statistic/estimator. Treats the sample as an "estimate" of the population of measurements (sample empirical cumulative distribution function as estimate of population...
Educational Assessment of Children Melissa Stern PSY 4930 October 3, 2006 Academic Achievement Skills children learn through direct intervention or instruction Educational assessment or achievement is a method of testing these skills Usually includes areas such as: Reading Spelling Writing...
Difficulties and techniques: Constraints are not linear Linearize using pseudo linear constraints Search Space too large Reduce search space Search is slow Add redundant constraints to speedup * ILP - Integer Linear Programming Linear Programming: linear constraints, linear objective, fractional...
Carleton University Fall 2009 ... Others include email downloads of music, videos, programs and apps Instant Messaging (IM) Voice Over IP (VoIP) Video-on-Demand (VOD) … 10/20/2009 * Social Networking PACKET-SWITCHED NETWORKS DNS HYPERTEXT DOCUMENTS HTML THE WORLD WIDE WEB TCP/IP...
Held by the Queen and Governor General (figureheads) Carried out by the Prime Minister and the Cabinet Judicial: the power to interpret and uphold Canadian laws. Power is invested in our court system Supreme Court of Canada is the highest...
Ready to download the document? Go ahead and hit continue!