Calcium is essential to tree growth. In 1990, the concentration of calcium in precipitation in a certain area was 0.12 milligrams per liter A random sample of 10 precipitation dates in 2018 results in the following data table. Complete parts (a) through (c) below. E Click the icon to view the data table. Data table (a) State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990. V0.12 mg/L Ho: H;: V0.12 mg/L 0.076 0.071 0.069 0.232 0.111 0.189 0.115 0.204 0.317 0.113

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