Stat 243
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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| What is Statistics? | Statistics is a way of reasoning, along with a collection of tools and methods, designed to help us. collecting, organizing and interpretation of data.
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| What are statistics? | Statistics ( plural) are particular calculations made from data.
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| Difference between a parameter and statistic? | Parameter is any characteristic about a population. Statistic is any characteristic about the sample.
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| Discrete data | assume values that can be counted. (age in years, number of family members)
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| Continuous data | can assume all values between any two specific
values. (Usually measurements.) Height, Weight, Time, Income
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| Context | The context ideally tells Who was measured, What was measured, How the data were collected, Where the data were collected, and When and Why the study was performed.
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| Data | Systematically recorded information, whether numbers or labels, together with its context .
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| Data table | An arrangement of data in which each row represents a case and each column represents a variable.
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| Case | A case is an individual about whom or which we have data.
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| Sample | The cases we actually examine in seeking to understand the much larger population.
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| Population | All the cases we wish we knew about.
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| Variable | A variable holds information about the same characteristic for many cases.
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| Units | A quantity or amount adopted as a standard of measurement, such as dollars, hours, or grams.
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| Categorical variable | A variable that names categories ( whether with words or numerals) is called categorical.
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| Quantitative variable | A variable in which the numbers act as numerical values is called quantitative. Quantitative variables always have units.
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| Identifier variable | A variable holding a unique name, ID number, or other identification for a case. Identifiers are particularly useful in matching data from two different databases or relations.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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.
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:
Musapdx
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