In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: measures of central tendency such as ________________________________ summarize a distribution of scores by describing the most common, the middle score, or the average score of the distributionAnswer: mode, , and mean Question: central purpose of descriptive statistics is to __________________ dataAnswer: summarize or Question: the exact center of a distribution of scoresAnswer: mode Question: median can be found for _______________ data, but generally it more appropriate for ______________ data.Answer: interval ; ordinal Question: ______________identifies a point below which a specific percentage of cases fallAnswer: Question: the 5th decile, is equal to the ________ percentileAnswer: Question: D1 or the first decile is the point below which ______________ of the cases fallAnswer: 10% Question: If you scored higher than the 3rd quartile (Q3) then you made __________________________Answer: 75% of the scores Question: most commonly used of central tendencyAnswer: mean (x bar) Question: for mean (x bar)=Answer: the sum of (xi) / Question: characteristics of the mean:Answer: 1. the mean balances out all scores (mean is pt around which all scores cancel out); 2. mean minimizes of scores (least squares principle); 3. mean affected by all scores and can be misleading if distribution has extreme outliers Question: what does least square say?Answer: mean is pt around which variation of score is minimized; if difference b/t scores and mean are and then added, the resultant sum will be less than the sum of the squared differences b/t the scores and any other point in the distribution Question: This principle underlies the fact that the mean is closer to all of the scores than the measures of central tendencyAnswer: least squares Question: distributions with outliers have a ___________:Answer: Question: if you have some extremely high , what will happen to the distribution curve?Answer: it will skew to the (+) = (mean>median) Question: when mean > median, what would you expect your distribution to look like?Answer: to the right (+ skew) Question: if you have some extremely low outliers, what will happen to the curve?Answer: it will skew to the L (-) = mean< Question: if mean < , what would you expect your distribution curve to look like?Answer: to the left (- skew) Question: the mean will be pulled _______________ of the outlying scores relative to the medianAnswer: in the Question: the greater the skew, the ______________ the difference between the 2 measures of central tendency (mean & median)Answer: Question: the mean and median will have the same value only in distributions that are ________________-Answer: Question: the mode is the most ___________________ and is used most appropriately with _____________________variablesAnswer: value; nominal-level Question: _____________ describe the variety, diversity, or heterogeneity of a distribution of scores; describes the variability of data (variants.)Answer: of dispersion Question: measure of dispersion can reveal substantial differences between distributions even when _____________________ are the sameAnswer: of central tendency Question: :Answer: between highest and lowest scores in distribution (high score-low score) Question: the greater the value of a range the greater the _______________ in the distributionAnswer: Question: to rangeAnswer: range exaggerate the amount of dispersion for most of scores in distribution Question: IQR:Answer: the distance from the third to 1st ; a kind of range that acoids some of the problems associated with range outliers by considering only the middle 50% of the cases in distribution Question: three traits a good measure of should include:Answer: should use all the scores in the dist; describe the average or typical deviation of the scores; increase in value as the scores become more diverse Question: the sum of squared deviations will _______________ with sample sizeAnswer: Question: using the median, range and IQR depicts both the _______________ and _____________________-Answer: tendency; variability Question: line in the middle of the IQR box represents :Answer: Question: scores that are beyond 3 times the of the IQR box in either direction are termed:Answer: extreme outliers (outliers are outside of 1.5 of box or outside the whiskers) Question: the standard deviation is ____________ for more diverse distributions and ______________ for less diverse distributionsAnswer: ; lower Question: of x-sub-I = Answer: the sum of all data Question: t/f data that has a mean of 30 and a range of zero means there is littler Answer: false - no Question: if you take all data points in a sample and find the difference between the mean and the sum, the answer will be?Answer: 0 Question: the sum of x sub i - x bar =Answer: Question: to mean:Answer: outliers (extreme values) skew the |
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