Maxine works for the federal government and wants to examine the side effects of two COVID-19 vaccines from two different drug companies (Company A and Company B)? Number of side effects was recorded per participant after receiving the vaccine. In order to control for subject variability, Maxine recruited 5 sibling pairs as participants and randomly assigned them to either Company A or Company B vaccines.  c) What is the test statistic rounded to 2 decimals (examples of test-statistics depending on the statistical test are: zobs, tobs, r or b)?

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