 # Data analysis (chapter 2) SI units and the metric system ▫Base units  Time (sec)  Length (m)  Mass (kg)  Temperature (Kelvin)  Derived base units.

## Presentation on theme: "Data analysis (chapter 2) SI units and the metric system ▫Base units  Time (sec)  Length (m)  Mass (kg)  Temperature (Kelvin)  Derived base units."— Presentation transcript:

Data analysis (chapter 2) SI units and the metric system ▫Base units  Time (sec)  Length (m)  Mass (kg)  Temperature (Kelvin)  Derived base units  Volume (m 3 )  Density (g/cm 3 )

Prefixes

Scientific notation Review how to add, subtract, multiply, and divide

Dimensional analysis

Accuracy (the nearness to the correct answer) and Precision (how close a series of measurements are to each other)

Percent error |Accepted – Measured| x 100 Accepted

Significant figures 1. Non-zero digits are always significant. 2. Any zeros between two significant digits are significant. 3. A final zero or trailing zeros in the decimal portion ONLY are significant.

Rules for rounding, adding, subtracting, multiplying, and dividing

Graphing Circle graph – data is based on 100% Bar graph – used to compared unique sets of data Line graph – most common

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