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# Math 1530

### chapter 1.1-1.3

Statistics The science of planning studies and experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on the data.
Data Collections of observations. Examples: measurements, genders, survey responses
Population The complete collection of all individuals to be studied
Census Collection of data from every member of a population
Sample Subcollection of members selected from a population
Voluntary Response Sample A sample for which the respondents themselves decide whether to be included.
Context Description of what the values represent.
Source The researchers geting all the data.
Sampling Method The samples that you choose to use to collect sample data. Example: Voluntary response sample
Conclusions Making statements that are clear to those without any understanding of statistics and its terminology.
Pratical Implications A practical conclusion. A statement that could be true.
Statistical Significance a statistical assessment of whether observations show a pattern rather than being just a chance.
Practical Significance a limit where an observed difference is of some practical use in the real world
Parameter Vs. Statistic Parameter: numerical measurement describing some characteristic of a population. Statistic: numerical measuremetn describing some characteristic of a sample.
Quantitative Vs. Categorical Quantitative data: consiste of numbers representing counts or measurements. Categorical data: consists of names or labels that are not numbers representing counts or measurements.
Discrete Vs. Continuous Discrete data result when the number of possible valuse is either a finite number or a "countable" number. Continuous data result from infinitely many possible values that correspond to some continuous scale that covers a range of values without gaps,
Levels of Measurements Ratio, interval, Nominal, Ordinal
Nominal Categories only. Data cannot be arranged in an ordering scheme.
Ordinal Categories are ordered, but differences can't be found or are meaningless.
interval Differences are meaningful, but there is no natural zero starting point and ratios are meaningless
Ratio Theres is a natural zero starting point and ratios are meaningful.
Created by: crickie11