MWF 2:30-3:20
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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| Population | A group that is being surveyed.
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| Stratified Sampling | A method actively seeking to poll people from many different backgrounds.
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| Biased Sample | A sample that ends up with one or more sub-groups that are either over-represented or under-represented, doesn't include the entire population.
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| Cherry Picking | The practice of polling only those who you think believe will support your cause.
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| Non-Response Bias | A survey that is simply handed out gains few responses when compared to the number of surveys given out.
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| Self-Selected | Respondents who tend to have stronger opinions on subjects than others and are more motivated to respond. Generally regarded as unscientific.
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| Face To Face Interview | -Fewer Misunderstood Questions
-High Response Rate
-Additional information can be collected from respondents
-Time Consuming
-Expensive
-Can be biased upon the attitude or the appearance of the surveyor
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| Self-Administered Surveys | -Respondents can complete on his or her free time
-Less expensive than face-to-face interviews
-Anonymity causes more honest results
-Lower response rate
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| Random Samples | A method in which people are chosen "out of the blue." In a true random sample, everyone in the population must have the same chance of being chosen. It is important that each person in the population has a chance of being picked.
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| Measure of Central Tendency | The mean, median, mode of a sample.
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| Frequency Distribution Table | Often used when a data set is large, easy to read and interpret.
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| Ungrouped Data | Data that is listed on a frequency distribution table.
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| Grouped Data | Data that is placed in intervals.
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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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