Statistics Vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Statistics | the sciences of collecting, analyzing, drawing conclusions from data
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| Descriptive statistics | the methods of organizing and summarizing data
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| inferential statistics | involves making generalizations from a sample to a population (hypothesis)
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| Population | the entire collection of individual objects about which info is desired
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| Sample | subset of the population selected for study in some prescribed manner
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| Variable | any characteristic who's value may change from one individual to another
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| Data | observations on single variable or simultaneously on 2 or more variables
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| Percentile |
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| Quartile |
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| Types of Variables |
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| Categorical/Qualitative | identifies basics differentiating characteristics of the population
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| Numerical/Quantitative | observations or measurements taken on numerical values
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| Discrete | listable set of values. Ex. Usually counts of items
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| Continuous | data can take on any values in the domain of the variable, usually measurements
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| Univariate | data that describes a single (un)characteristic of the population
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| Bivariate | data the describes 2(bi)characteristics of the population
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| Multivariate | data that describes more than 2 characteristics of the pop.
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| Graphs for categorical data: |
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| Bar | Used for categorical data.
- Not touch
- horizontal axis
- comment on which occurred the most/least
often
- bivariate data sets can have
double/segmented bar graph
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| Pie graph | categorical data
- to make one proportion x 360 deg.
- using protractor, mark off ea part
- desribe, comment on which occurred the
most/least often
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| Graphs for numerical data: |
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| Dotplot | - used w/ numerical data (discrete/continuous)
- put dots (or A's) on number line
- can make comparitive dotplots by using the
same axis for mult. groups
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| Shapes: |
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| Symmetrical | vertically cut in middle, bell shaped curve
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| Uniform | every class has equal frequency
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| Skewed | one side is longer than the other. Longer tail left or right)
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| Bimodal | 2 classes have same freq & separate to others
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| How to describe a numerical graph: |
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| Center | where middle of data is.
3 types: mean, medican, mode
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| Spread | how spread out data is.
3 types: range, standard deviation, IQR
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| Shape | overall shape of distribution
symmetrical, uniform, skewed, bimodal
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| Unusual occurances | outliers: value that lies away from rest of data (gaps, clusters)
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| In context | all answers written in correct form. Full sentences & correct vocab
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Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
palmerag
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