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Calcium is essential to tree growth because it promotes the formation of wood and maintains...

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Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls In 1990 the concentration of calcium in precipitation in a certain area was 0 15 milligrams per liter mg L A random sample of 10 precipitation dates in 2007 results in the following data table Complete parts a through c below Click the icon to view the data table CIDB a State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990 Ho Y 0 15 mg L H V 0 15 mg L

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