A patient undergoes prolonged treatment for low bone density. The density measurements in the table were made irregularly during this period. Visit Time in months from treatment start Density (g/cm²) 0.643 1 7 0.617 19 0.655 4 46 0.641 5 64 0.632 69 0.649 7 79 0.641 92 0.642 100 0.623 (a) What is the estimated rate of increase in density per *year*? (b) What is the standard error of this estimate? (c) Did the density change significantly over the time of the treatment.

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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.