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Statistics by Mind Map: Statistics

1. Descriptive statistics

1.1. Sample

1.1.1. Distribution of Scores Frequencies Frequency table Frequency graph Non-normal distribution Kurtosis Skewedness Multi-modal Normal distribution Z-Scores

1.1.2. Central Tendency Mean Median Mode

1.1.3. Variability Range Sum of Squares Variance

2. Inferential statistics

2.1. Use the sample to infer info about the population.

2.1.1. Probability Outcome of Interest/Total Possible Outcomes Ranges from 0 to 1 (.5 being 50/50 chance) "And" Probability "Or" Probability

2.2. Sampling procedures

2.2.1. Haphazard selection

2.2.2. Convenience sample

2.2.3. Snowball sampling

2.3. Above all, we want our sample to be representative of our population.

2.3.1. The best way to ensure this is through random sampling. When we can't ensure random sampling, the best we can do is make sure the sample isn't systematically unrepresentative.

3. Variables

3.1. Values

3.1.1. Scores

3.2. Levels of measurement

3.2.1. Qualitative Nominal

3.2.2. Quantitative Ordinal Interval Ratio

3.2.3. Discrete Nominal Ordinal

3.2.4. Continuous Interval Ratio