Question: Radish seedlings were randomly distributed and then grown under four conditions: natural lighting, darkness, regular (incandescent) light bulb, and full spectrum light bulb (providing ultraviolet

Radish seedlings were randomly distributed and then grown under four conditions: natural lighting, darkness, regular (incandescent) light bulb, and full spectrum light bulb (providing ultraviolet lighting). Heights of the seedlings were measured after 9 days. The data are summarized below.10

(a) State in words the null hypothesis that is tested using ANOVA here.
(b) The F-value for the F test is 2.9 Ã— 10-l2. What is your conclusion regarding the null hypothesis?
(c) Is it proper to draw a cause-effect conclusion from these data? Why or why not?

Natural Dark Regular bulb Full spectrum Mean 5.72 9.06 2.19 4.09 1.40 1.87 5.16 2.44. SD 20 25 20 24

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