CH 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Statistics | Is the science of data
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| Two branches of statistics? | Descriptive statistics,Inferential statistics
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| Descriptive Statistics | Consists of the collection, organization, summarization, and presentation of data
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| Inferential Statistics | Consists of generalizing from samples to populations by..
Performing estimations and hypothesis tests,Determining relationships among variables,Making predictions,
Uses probability( the chance of an event occurring)
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| Population | Consists of all subjects (human or otherwise) that are being studied.
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| Sample | Is a group of subjects selected from a population.
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| Variable | Is a characteristic or attribute that can assume different values.
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| Data | are the values (measurements or observations) that the variables can assume.
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| Random variable | variables whose values are determined by chance.
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| Types of Data | Variables can be classified as qualitative or quantitative
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| Qualitative | variables that can be placed into distinct categories, according to some characteristic or attribute
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| Quantitative | variables that are numerical and can be ordered or ranked
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| Qualitative Variables | Categorical, Can be further classified into two groups, nominal and ordinal
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| Nominal Data | data can be classified into mutually exclusive (non-overlapping) categories in which no order or ranking can be imposed.
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| Ordinal data | can be classified into categories that can be ranked or ordered
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| Quantitative Variables | Numerical,Can be further classified into two groups, discrete and continuous.
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| Discrete variables | can be assigned values such as 0, 1, 2, 3 and are said to be countable. Obtained by counting
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| Continuous variables | can assume an infinite number of values in an interval between two specific values. Obtained by measuring
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| inferential statistics goal | learn about a population by using a sample
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| unbiased samples | Each subject in the population has an equally likely chance of being selected.
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| Observational study | the researcher observes what is happening (or what has happened in the past) and tries to draw conclusions based on these observations.
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| Experimental study | the researcher manipulates one of the variables and tries to determine how the manipulation influences other variables.
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| independent variable | one that is being manipulated by the researcher
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| dependent variable | the outcome
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
sarahs_93
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