In an area having sandy soil, 60 small trees of a certain type were planted, and another 60 trees were planted in an area having clay soil. Let X = the number of trees planted in sandy soil that survive 1 year and Y= the number of trees planted in clay soil that survive 1 year. If the probability that a tree planted in sandy soil will survive 1 year is 0.7 and the probability of 1-year survival in clay soil is 0.6, compute an approximation to P(-6 SX- YS 6) (do not bother with the continuity correction). (Round your answer to four decimal places.)

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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.