Question
Cadmium, a heavymetal, is toxic to animals.Mushrooms, however, are able to absorb and accumulate cadmium at high concentrations. A government set a safety limit for
Cadmium, a heavymetal, is toxic to animals.Mushrooms, however, are able to absorb and accumulate cadmium at high concentrations. A government set a safety limit for cadmium in dry vegetables at 0.5 parts per million(ppm). The cadmium levels in a random sample of one species of edible mushroom are in the accompanying data set. At the 5% significancelevel, do the data provide sufficient evidence to conclude that the mean cadmium level in this species of mushroom is greater than thegovernment's recommended limit of 0.5 ppm? Assume that the population standard deviation of cadmium levels in this species of mushroom is 0.33 ppm. Preliminary data analyses indicate that applying thez-test is reasonable.(Note: The sum of the data is 7.13 ppm.)
find what z=?
Ho: u ppm
Ha: u ppm
Find what p=?
Complete the following
the null hypothesis. At the 5% significancelevel, the data sufficient evidence to conclude that the mean cadmium level is
Candium concentration(ppm): 0.49
0.41
0.51
0.27
0.26
1.21
0.94
0.67
0.85
0.36
0.58
0.58
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