?Rats’ Red Blood Cell Counts Researchers at NASA wanted to learn the effects of spaceflight on a rat’s red blood cell count (RBC). The following data r
Chapter 15, Problem 19(choose chapter or problem)
Rats’ Red Blood Cell Counts Researchers at NASA wanted to learn the effects of spaceflight on a rat’s red blood cell count (RBC). The following data represent the RBC at lift-off minus 3 days (RBC-L3) and immediately upon return (RBC-R0) of 27 rats sent to space on the Spacelab Sciences 1 flight.
They used Minitab to test whether the RBC three days prior to lift-off was different from the RBC upon return. The results are as follows:
(a) State the null and alternative hypotheses.
(b) Does it appear that the flight to space affected the RBC of the rats? Use the = 0.05 level of significance. Support your answer.
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