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StatisticS
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1. Collecting data (questionaires, recording numbers, surveys)
2. Describe Date (average - arithmetic mean, graphs, tables, measures of central tendency)
3. Analyze Data - what we will be doing in statistics
4. Interpret Date - How can you use this analyzed data, descisions made from it
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Population
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Set of all individuals of interest in a particular study.
scientific research begins with a general question about a specific group of individuals.
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Sample
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Set of individuals selected from a population, usually intended to represent the population in a research study.
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Valiable
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A characteristic or condition that changes or has different values for different individuals.
Ex: height, gender, personality
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Data (plural)
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Are mesurements or observations
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Data Set
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A collection of measurements or observations
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Datum (singular)
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Is a single measurement or observation
Commonly called: Score or raw score
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What is Datum usually called?
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Score or raw score
(refer to a population or samples of scores)
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Parameter
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Is a value, usually a numerical value, that describes a population. A parameter may be obtained from a single measurement or it may be derived from a set of measurements from the population.
it is a known value. measure of CENTRAL TENDENCY (average) SPREAD of the data for population. BUT not exact - don't have HOLE population
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How are Parameters obtained?
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A parameter may be obtained from a single measurement or it may be derived from a set of measurements from the population.
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StatistiC
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A value, usually a numerical value, that describes a sample. A statistic may be obtained from a single measurement, or it may be derived from a set of measurments from the sample.
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How is a Statistic obtained?
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A statistic may be obtained from a single measurement, or it may be derived from a set of measurments from the sample.
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Every population parameter has a corresponding______ ______.
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Sample Statistic
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Much of the book is concerned with...?
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The relationship between sample statistics and the corresponding population parameters.
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Descriptive Statistics
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Statistical procedures used to summarize, organize, and simplify data.
The first 2 steps of statistics - 1. Collecting Date, 2. Describe Data - organize/ summerize
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