What are the null and alternative hypotheses? Calcium is essential to tree growth. In 1990, the concentration of calcium in precipitation in Chautauqua, New York, was 0.11 milligram per liter in the following data: 0.087 0.070 0.262 0.126 0.183 0.120 0.234 0.313 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=0.1 level of significance. Ho ▼ H₁: (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? the null hypothesis and conclude that there mg Since P-value Va A random sample of 8 precipitation dates in 2018 results sufficient evidence that the calcium level in rainwater has changed.