Radon: The Problem No One Wants to Face" is the title of an article appearing inConsumer Reports. Radon is a gas emitted from the ground that can collect in houses and buildings. At certain levels it can cause lung cancer. Radon concentrations are measured in picocuries per liter (pCi/L). A radon level of 4 pCi/L is considered "acceptable." Radon levels in a house vary from week to week. In one house, a sample of 8 weeks had the following readings for radon level (in pCi/L)

1.9, 3, 5.7, 5.5, 1.9, 8.2, 3.9, 6.8

(a) Find the mean, median, and mode. (Round your answers to two decimal places.)

(b) Find the sample standard deviation, coefficient of variation, and range. (Round your answers to two decimal places.)

(c) Based on the data, would you recommend radon mitigation in this house? Explain.