Karteikarten
Ohne Titel
Karten in diesem Stapel (27)
- 1statisticstransforming data into useful information for decision makers
- 2descriptive statisticscollecting, summarizing, visualizing, presenting, and analyzing daa
- 3inferential statisticsusing the data collected from a small group to draw conclusions about a larger group
- 4variablea characteristic of an item or individual
- 5datathe set of individual values associated with a variable
- 6categorical (qualitative)placed in 2 categories like yes and no
- 7numerical (quantitative)representing quantities like how many sisters do you have, width, length
- 82 types of numericaldiscrete and continuous
- 9discretevariables arise from a counting process, like number of children
- 10continuousvariables arise from a measuring process, like weight
- 11between discreet and continuous, which one can have decimals?continuous
- 12what is the purpose of studying statistics?to study parameter
- 13population (too large)all items or individuals about which you want to draw a conclusion
- 14samplea part of a population
- 15central tendencythe extent to which all the data values group around a typical or central value
- 16variationamount of dispersion or scattering of values
- 17shapethe pattern of the distribution of values from the lowest value to the highest value
- 18what measures central tendencymean and median
- 19in central tendency how many medians can there beonly one!!!
- 20mode in central tendencycan sometimes be nothing
- 21skewnessmeasures the amount of asymmetry in a distribution
- 22kurtosismeasures the relative concentration of values in the center of a distribution as compared with the tails
- 23covariancemeasures the strength of the linear relationship between two numerical variables
- 24binomial distrubutiona frequency distribution of the possible number of successful outcomes in a given number of trials in each of which there is the same probability of success
- 25example of a binomial distributionnew job applicants either accept the offer or reject it
- 26when to use poisson distributionwhen you are interested in the number of times an event occurs in a given area of opportunity
- 27area of opportunitycontinuous unit or interval of time, volume, or such area in which more than one occurrence of an event can occur. eg) number of mosquito bites
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- Beschreibung
- Karteikarten am Ohne Titel, erstellt von yaydjones am 24/02/2014.
- Erstellt von
- yaydjones · Feb 2014
- Aktualisiert
- 19 Feb 2016
- Aufrufe
- 14
- Bewertung