Introduction to Laboratory Measurements Purpose Make mass, length, and volume measurements in the laboratory and use a spreadsheet program for data analysis. Learning Objectives Define and give examples of accuracy and precision. Explain the relationship of accuracy and precision to systematic error, random error, percent error, coefficient of variation, and to significant figures. Describe and carry out the correct procedures for using electronic balances and mechanical pipets. Measure lengths with appropriate approximation of final digit. Calculate density from mass and volume measurements. Calculate the volume of water from mass and temperature measurements given tabulated density values water at various temperatures. Enter, label and format data in a spreadsheet. Carry out calculations in a spreadsheet using cell addresses in formulas. Analyze data using built-in spreadsheet functions including average and standard deviation. Calculate percent error and coefficient of variation of data using a spreadsheet.