A researcher wishes to determine whether people with high blood presssure can lower their blood pressure by performing yoga exercises. A treatment group and a control group are selected. The sample statistics are given below. Construct a 90% confidence interval for the difference between the two population means, u1-u2. Would you recommend using yoga exercises? Treatment Group n1= 100 x= 178 s1=35 Control Group n2= 100 x2= 193 s2= 37

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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.