question archive Calcium is essential to tree growth
Calcium is essential to tree growth
Subject:StatisticsPrice: Bought3
Calcium is essential to tree growth. 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 2018 results in the following data table. Complete parts? (a) through? (c) below.
Data table below
0.076
0.071
0.069
0.276
0.118
0.172
0.132
0.245
0.325
0.118
(a) State the hypotheses for determining if the mean concentration of calcium precipitation has changed since 1990.
(b) Construct a 98?% confidence interval about the sample mean concentration of calcium precipitation
(c) Does the sample evidence suggest that calcium concentrations have changed since? 1990?
