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Mr. York's statistic
MWF 2:30-3:20
Question | Answer |
---|---|
Population | A group that is being surveyed. |
Stratified Sampling | A method actively seeking to poll people from many different backgrounds. |
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. |
Cherry Picking | The practice of polling only those who you think believe will support your cause. |
Non-Response Bias | A survey that is simply handed out gains few responses when compared to the number of surveys given out. |
Self-Selected | Respondents who tend to have stronger opinions on subjects than others and are more motivated to respond. Generally regarded as unscientific. |
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 |
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 |
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. |
Measure of Central Tendency | The mean, median, mode of a sample. |
Frequency Distribution Table | Often used when a data set is large, easy to read and interpret. |
Ungrouped Data | Data that is listed on a frequency distribution table. |
Grouped Data | Data that is placed in intervals. |