TEST 1 CheatSheet.docx - Sample types o Stratified sampling \u2013(Group according to some similarity or characteristic divide population into groups and

# TEST 1 CheatSheet.docx - Sample types o Stratified sampling...

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Sample types o Stratified sampling – ( Group according to some similarity or characteristic) divide population into groups and do a SRS for each group o Cluster sampling – (e.g. left side of library v/ right side of library) divide the population into groups, take a SRS of the groups and sample everyone in the selected groups o Systematic sampling – ( Sequential order) select every kth individual and then choose the first person with a random start Skew o Right Skewed Mean is always larger than the median o Symmetrical Mean & Median are very similar, possibly the same o Left Skewed Mean is always smaller than the median Five-number summary - is comprised of o Minimum, Q1, (25% of data is lower than Q1, 75% is higher), Q2 (or median), The measure of center, Q3