The birth weights (in kilograms) of a sample of 166 children are given in the table. Find the mean and standard deviation of the weights. (Round your answers to three decimal places.) kg kg mean standard deviation Weight (kg) Frequency Weight (kg) Frequency 2.0 3 3.5 23 2.3 3.8 22 2.6 26 4.1 16 2.9 25 4.4 11 3.2 26 4.7 5

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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.