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Unit 5 ProbStats2

  •  English    48     Public
    Simulations, Sampling, Surveys, Observational Studies, Experiments
  •   Study   Slideshow
  • An outcome is ______________ if we know the possible values it can have, but not which particular value it takes.
    Random
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  • this models a real-world situation by using random-digit outcomes to mimic the uncertainty of a response variable of interest.
    Simulation
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  • The sequence of several components representing events that we are pretending will take place.
    Trial
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  • Values of the __________________ record the results of each trial with respect to what we were interested in.
    Response Variable
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  • The entire group of individuals or instances about whom we hope to learn.
    Population
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  • A (representative) subset of a population, examined in hope of learning about the population.
    Sample
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  • A study that asks questions of a sample drawn from some population in the hope of learning something about the entire population. Polls taken to assess voter preferences are common examples of this.
    Sample Survey
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  • Any systematic failure of a sampling method to represent its population is ___________.
    Bias
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  • The best defense against bias is ____________________, in which each individual is given a fair, random chance of selection.
    Randomization
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  • The number of individuals in a sample. It determines how well the sample represents the population, not the fraction of the population sampled.
    Sample Size
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  • A sample that consists of the entire population is called a _____________.
    Census
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  • A numerically valued attribute of a model for a population.
    Population Parameter
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  • ,__________________ are values calculated for sampled data.
    Statistic or Sample Statistic
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  • A sample is said to be __________________ if the statistics computed from it accurately reflect the corresponding population parameters.
    Representative
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  • A _________________ of sample size n is a sample in which each set of n elements in the population has an equal chance of selection.
    Simple Random Sample
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  • A list of individuals from whom the sample is drawn.
    Sampling Frame
  •  15