A forest ranger has data on the heights of a large growthof young pine trees. The mean height is 3.2 feet and thestandard deviation 0.6 feet. A histogram shows that the distribution of heights is approximately normal. Approxi-mately what fraction of the trees should we expect to be between 4.0 and 4.4 feet tall?A) 2% B) 7% C) 9%D) 91% E) 98%

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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.