Statistical Techniques

• Demonstrate an understanding of number, area, and scale. • Demonstrate an understanding of the quantitative relationships between units. • Understand and correctly use proportion, ratio, magnitude, and frequency. • Understand and correctly use appropriate measures of central tendency, spread, and cumulative frequency (median, mean, range, quartiles, inter-quartile range, mode, modal class). • Calculate and understand percentages (increase and decrease) and percentiles. • Design fieldwork data collection sheets and collect data with an understanding of accuracy, sample size, procedures, control groups, and reliability. • Interpret tables of data. • Describe relationships in bivariate data. • Sketch trend lines through scatter plots and draw estimated lines of best fit. • Make predictions by interpolating and extrapolating trends from data. • Identify weaknesses in statistical presentations of data. • Draw and justify conclusions from numerical and statistical data.