Core - Statistics

    Chapter 1

    Understanding Statistics

    1.1 : Introduction to Statistics01:17

    1.1 : Introduction to Statistics

    The science of statistics involves collecting, analyzing, interpreting, and presenting data. The method of collecting, organizing, and summarizing data is ...

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    1.2 : How Data are Classified: Categorical Data01:11

    1.2 : How Data are Classified: Categorical Data

    A variable, usually notated by capital letters such as X and Y, is a characteristic or measurement that can be determined for each member of a population. ...

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    1.3 : How Data are Classified: Numerical Data00:59

    1.3 : How Data are Classified: Numerical Data

    Data that are countable or measurable in specific units are called numerical or quantitative data. Quantitative data are always numbers. Quantitative data ...

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    1.4 : Nominal Level of Measurement00:56

    1.4 : Nominal Level of Measurement

    The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of ...

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    1.5 : Ordinal Level of Measurement00:55

    1.5 : Ordinal Level of Measurement

    The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of ...

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    1.6 : Interval Level of Measurement00:55

    1.6 : Interval Level of Measurement

    For effective statistical analysis, data are classified into four levels of measurement—nominal, ordinal, interval, and ratio. Data measured using ...

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    1.7 : Ratio Level of Measurement00:54

    1.7 : Ratio Level of Measurement

    The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of ...

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    1.8 : Data Collection by Observations01:08

    1.8 : Data Collection by Observations

    Data collection refers to a systematic way of obtaining, observing, measuring, and analyzing accurate information. Observational studies are one of the ...

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    1.9 : Data Collection by Experiments01:13

    1.9 : Data Collection by Experiments

    Data collection is a systematic method of obtaining, observing, measuring, and analyzing accurate information. An experimental study is a standard method ...

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    1.10 : Data Collection by Survey01:07

    1.10 : Data Collection by Survey

    The systematic method of obtaining and analyzing accurate information of a population is called data collection. A survey is a standard method of data ...

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    1.11 : Random Sampling Method01:09

    1.11 : Random Sampling Method

    Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the ...

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    1.12 : Systematic Sampling Method01:17

    1.12 : Systematic Sampling Method

    Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the ...

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    1.13 : Convenience Sampling Method00:55

    1.13 : Convenience Sampling Method

    Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the ...

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    1.14 : Stratified Sampling Method01:16

    1.14 : Stratified Sampling Method

    Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the ...

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    1.15 : Cluster Sampling Method01:20

    1.15 : Cluster Sampling Method

    Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population ...

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