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8) IntheSpapcelabLifeSciencePayload,14maleratsweresenttospace.Upontheirrerurn,thered
bloodcellmass(inmilliliters)oftheratswasdetermined.controlgroupof14maleratswasheld
underthesameconditionsasthespacerats,andtheirredbloodcellmasswasalsodetermined
whenthespaceratswasreturned.Theproject,ledbyDr.PaulX.Callahan,resultedinthedatalisted
inthetablebelow.Doestheevidencesupporttheclaimthattheflightanimalshavedifferentredblood
cellmassfromofthecontrolanimal?
Flight:
Control:
9.79 7.54
8.55 9.14
8.59
8.64
7.43
7.21
6.87
7.89
6.85
7.00
8.80
9.30
8.03
6.39
8.65
6.99
8.40
9.66
7.62
7.44
8.70
7.33
8.58
9.88
9.94
7.14
b)Use95%confidenceintervaltoconstructconfidenceintrevaltoestimatethedifferencebetween
thetwopopulationmeans.doestheconfidenceintervalsupporttheclaim?Explain.
8.59
8.64
7.43
7.21
6.87
7.89
6.85
7.00
8.80
9.30
8.03
6.39
Solution

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