Question: 8. Twenty seedlings are divided at random into two groups. The first group is grown under normal light conditions; the second group in conditions of

8. Twenty seedlings are divided at random into two groups. The first group is grown under normal light conditions; the second group in conditions of restricted light. After 4 months the heights of the seedlings are measured and recorded. The mean for the normal group is 40.2 and the sd is 3.5. The restricted mean is 35 and the standard deviation is 4.94. Is there a difference between the 2 conditions at the 5% level?

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