A workout coach believes that walking every day can produce the same health benefits as jogging. Ten volunteers are paired based on significant characteristics, and half of the group is asked to walk every day and half of the group is asked to jog every day.  The amounts of weight lost (in pounds) over a 30-day period are recorded in the following table. Construct a 99% confidence interval for the true mean difference between the amount of weight lost by jogging and the amount of weight lost by walking. Assume that the population distribution of the paired differences is approximately normal. Round to one decimal place.   Weight Loss (in pounds) Pair 1 2 3 4 5 Walking 9 9 5 10 9 Jogging 11 14 8 15 11

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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.