Suppose (-2.18,11.73) is a 96% confidence interval for the difference of two population means, an that sample sizes from those populations were n = 18, n2= 26, Circle the most appropriate interpretation of this confidence interval. (i) The probability that u1-H2 lies inside this interval is 96%. (ii) 96% of random samples eEšxe n1,n2 from the respective populations have a difference of means x-, that lies inside this interval. (iii) 96% of the time, µ1 - µ2 lies inside this interval. (iv) Usually such an interval contai s u- #2, but about 4% of the time an interval constructed this way does not contain 4 -| 2- Is it reasonable to assume that the distribution of the difference x-2 of sample means is normal?

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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.