Conduct an additional experiment using larger sample sizes

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Imagine that one of the following 95 percent con?dence intervals estimates the effect of vitamin C on IQ scores:

95% confidence interval: 1,2,3,4,5

Lower limit: 100,95,102,90,91

Upper limit: 102,99,106,111,98

(a) Which one most strongly supports the conclusion that vitamin C increases IQ scores?

(b) Which one implies the largest sample size?

(c) Which one most strongly supports the conclusion that vitamin C decreased IQ scores?

(d) Which one would most likely stimulate the investigator to conduct an additional experiment using larger sample sizes?

Reference no: EM131533731

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