7. The following data of arsenic concentration (ppm) in toenail clippings are collected from 19 individuals, who drink from private wells in New Hampshire. Test the alternative hypothesis that the average level of arsenic concentration is more than 0.15ppm. Use 0.025 as the level of significance to make decision. 0.119 0.118 0.099 0.118 0.275 0.358 0.158 0.310 0.105 0.073 0.832 0.517 0.851 0.269 0.433 0.141 0.135 0.175 0.080 hon List the null and alternative hypotheses first. What is your best estimate of the p- value?