Statistics Notes 1.1-1.3

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Four statistical phases: Research Question, Experimental Design, Description, Inference

The Science of Stats: Collection, Analysis, Interpretation, Presentation of Data.

From population we create our samples

Sampling frame: Identifying group of population

Random sample represents population.

Quantitative Variable: Numerically Measured

Qualitative Variable: Categorically measured

Statistic (Number that represents property of sample) VS Parameter (Numerical Characteristic)

Discrete (whole number of quantifiable objects) [# of books] vs Continuous ( accurately measured number) [weight of books]

Mean, Median, Mode

Proportions:

Percentage: Proportions times 100

Categorical charts: Frequency Table, Bar Chart, Pie Chart, Relative Frequency table

Quantitative Charts: Stemplot, Histogram, Boxplot.

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