10.3*

8. mg Calcium is essential to tree growth. In 1990, the concentration of calcium in precipitation in Chautauqua, New York, was 0.11 milligram per liter L A random sample of 8 precipitation dates in 2018 results in the following data: 0.126 0.087 0.313 0.183 0.070 0. 108 0.120 0.262 A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot does not show any outliers. Does the sample evidence suggest that calcium concentrations have changed since 1990? Use the a = 0.01 level of significance. What are the null and alternative hypotheses? Ho: (1 ). (2) H1 : (3 ) (4) (Type integers or decimals. Do not round.) Find the test statistic. to = (Round to two decimal places as needed.) Find the P-value. P-value = (Round to three decimal places as needed.) Is there sufficient evidence that calcium concentrations have changed since 1990? Since P-value (5) a, (6) the null hypothesis and conclude that there (7) . sufficient evidence that the calcium level in rainwater has changed. (1) 0 6 (2) (6) O do not reject (7) O is O O > O O = =