A scientist claims that pneumonia causes weight loss in mice. The table shows the weights (in grams) of six mice before infection and two days after infection. At a = 0.05, is there enough evidence to support the scientist's claim? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (e) below. Mouse 1 2 3 4 Weight (before) Weight (after) 19.5 22.8 20.8 19.6 20.9 23.5 | 18.2 21.9 20.1 19.2 19.9 22.6 (a) Identify the claim and state Ho and Ha. What is the claim? O A. Weight loss causes pneumonia in mice. O B. Pneumonia causes weight loss in mice. O C. Pneumonia causes weight gain in mice. O D. Weight gain causes pneumonia in mice. Let Ha be the hypothesized mean of the difference in the weights (before - after). What are Ho and H,? O A. Ho: Ha = 0 O B. Ho: Ha s0 Ha: Ha >0 OC. Ho: Ha sa Ha: Ha #0 O D. Ho: Hazd OF. Ho: Ha 20 Ha: Ho

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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.