3 A biologist is studying the relationship between height above sea level and the numbers of certain species of plant at that particular height over an area of 100 m2. The table shows the information collected. Height (metres) Number of plants 100 200 450 500 700 900 1000 1 8. 8 10 12 13 Plot the data points on a scatter graph. Label the axes. b Find Pearson's product moment correlation coefficient, r. a C Comment on the correlation.

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.