Stats Quiz 5/29
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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Cross-sectional study | data collected at a fixed point in time
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Retrospective (case controlled) study | data collected about the past (records, interviews, etc)
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Prospective study | data collected in the future from groups sharing common factors
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Randomization | Randomly select subjects for different groups
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Replication | Results can be repeated on more than one subject to reach the same result
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Blinding | Subjects do not know which group they are in (placebo)
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Double blinding | Researcher doesn't know which group the subject is in
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Placebo effect | An untreated subject reports and improvement in symptoms
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Confounding | occurs in an experiment when you are unable to distinguish the effects of different factors
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Completely Randomized Experimental Design | Assign subjects to different treatment groups through random selection
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Randomized Block Design | Form blocks of subjects with similar characteristics
Randomly assign subjects within the blocks
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Rigorously Controlled Design | Carefully assign subjects to different treatments so that subjects for a particular treatment are important to the researcher.
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Matched Pairs Design | Compare exactly two treatment groups with subjects that are matched to have similar characteristics
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Sampling error | Results do not match results in whole population
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Nonsampling error | Occurs when data is incorrectly collected or analyzed
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Center | representative value for “the middle” of the data set
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Variation | measure of the amount of data that values vary
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Distribution | shape of the spread of the data
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Outliers | Sample values that lie far away from the majority of other values
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Frequency Distribution | also known as a frequency table, it shows how the data set is partitioned over various categories given by listing the categories and the number of data values in each category
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Lower-class limits | Smallest numbers that can belong to different classes
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Upper-class limits | Largest numbers that can belong to different classes
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Class boundaries | Centers in the gaps between upper and lower class limits of successive classes
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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.
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Created by:
AlyRuth
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