Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium precipitation in a certain area was 0.11 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. (a) State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990. Ho: 0.11 mg/L H1: V0.11 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. Yes, because the confidence interval does not contain 0.11 mg/L. O B. Yes, because the confidence interval contains 0.11 mg/L. O C. No, because the confidence interval does not contain 0.11 mg/L. O D. No, because the confidence interval contains 0.11 mg/L.

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Chapter8: Sequences, Series, And Probability
Section8.CR: Chapter Review
Problem 37E: Find the positive geometric mean between 4 and 64.
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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 0.11 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.
(a) State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990.
Ho:
0.11 mg/L
Hy:
0.11 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?
A. Yes, because the confidence interval does not contain 0.11 mg/L.
O B. Yes, because the confidence interval contains 0.11 mg/L.
C. No, because the confidence interval does not contain 0.11 mg/L.
O D. No, because the confidence interval contains 0.11 mg/L.
Transcribed Image Text: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 0.11 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. (a) State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990. Ho: 0.11 mg/L Hy: 0.11 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? A. Yes, because the confidence interval does not contain 0.11 mg/L. O B. Yes, because the confidence interval contains 0.11 mg/L. C. No, because the confidence interval does not contain 0.11 mg/L. O D. No, because the confidence interval contains 0.11 mg/L.
- X
Data Table
0.066
0.086
0.078
0.253
0.115
0.183
0.103
0.219
0.314
0.116
Print
Done
Transcribed Image Text:- X Data Table 0.066 0.086 0.078 0.253 0.115 0.183 0.103 0.219 0.314 0.116 Print Done
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