Some governments have set a safety limit for cadmium in dry vegetables at 0.5 part per million (ppm). Researchers measured the cadmium levels in a random sample of a certain type of edible mushroom....

B. interpret the 95% confidence level

Extracted text: Some governments have set a safety limit for cadmium in dry vegetables at 0.5 part per million (ppm). Researchers measured the cadmium levels in a random sample of a certain type of edible mushroom. The accompanying table shows the data obtained by the researchers. Find and interpret a 95% confidence interval for the mean cadmium level of all mushrooms of this type. Assume a population standard deviation of cadmium levels in mushrooms of this type of 0.35 ppm. (Note: The sum of the data is 6.75 ppm.) Click here to view the data. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. Mushroom cadmium levels The 95% confidence interval is from ppm to (Round to three decimal places as needed.) ppm. 0.31 0.70 0.68 0.17 0.83 1.16 0.98 0.26 0.38 0.28 0.66 0.34