Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the con

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Calcium Is Essential To Tree Growth Because It Promotes The Formation Of Wood And Maintains Cell Walls In 1990 The Con 1 (11.6 KiB) Viewed 40 times

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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 0.12 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.
0.066 0.075 0.075 0.186 0.136 0.218 0.246 0.129 0.336 0.117 ㅁ
Ho: H₁: 0.12 mg/L 0.12 mg/L
(b) Construct a 99% confidence interval about the sample mean concentration of calcium precipitation. The lower bound is The upper bound is (Round to four decimal places as needed.)
(c) Does the sample evidence suggest that calcium concentrations have changed since 1990? O A. No, because the confidence interval contains 0.12 mg/L. OB. No, because the confidence interval does not contain 0.12 mg/L.
OC. Yes, because the confidence interval does not contain 0.12 mg/L. O D. Yes, because the confidence interval contains 0.12 mg/L.