An investigator tests a claim that vitamin C alters the severity of common colds. To eliminate variability due to different family environments, pairs of children from the same family are randomly assigned to either a treatment group that receives vitamin C or a control group that receives a placebo. Each child estimates, on a 10 point scale, the severity of their colds during the school year. The following scores were obtained from 10 pairs of children. What should the investigator conclude? (assume two-tailed test) Pair number Vitamin C Placebo 1 2 3 2 5 4 3 7 9 4 0 3 5 3 5 6 7 7 7 4 6 8 5 8 9 1 2 10 3 5

An investigator tests a claim that vitamin C alters the severity of common colds. To eliminate variability due to different family environments, pairs of children from the same family are randomly...

An investigator tests a claim that vitamin C alters the severity of common colds. To eliminate variability due to different family environments, pairs of children from the same family are randomly assigned to either a treatment group that receives vitamin C or a control group that receives a placebo. Each child estimates, on a 10 point scale, the severity of their colds during the school year. The following scores were obtained from 10 pairs of children. What should the investigator conclude? (assume two-tailed test)

Jun 07, 2022