Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 6.36.3 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 2424 samples is 6.66.6 ppm with a variance of 1.001.00. Does the data support the claim at the 0.0250.025 level? Assume the population distribution is approximately normal.

Step 3 of 5:

Specify if the test is one-tailed or two-tailed.

Answer