Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.7 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 23 samples is 8.1 ppm with a standard deviation of 0.7. Does the data support the claim at the 0.025 level? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses. \fOur environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.7 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 23 samples is 8.1 ppm with a standard deviation ofOJ\". Does the data support the claim at the 0.025 level? Assume the population distribution is approximately normal. Step 2 of 5: Find the value of the test statistic. Round your answer to three decimal places. Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.7 partslmillion (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 23 samples is 8.1 ppm with a standard deviation of 0.7. Does the data support the claim at the 0.025 level? Assume the population distribution is approximately normal. Step 3 of 5: Specify if the test is onetailed or twotailed. \fOur environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.7 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 23 samples is 8.] ppm with a standard deviation of 0.7. Does the data support the claim at the 0.025 level? Assume the population distribution is approximately normal. Step 4 of 5: Determine the decision rule for rejecting the null hypothesis. Round your answer to three decimal places. \fOur environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.7 partslmillion (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 23 samples is 8.1 ppm with a standard deviation of 0.7. Does the data support the claim at the 0.025 level? Assume the population distribution is approximately normal. Step 5 of 5: Make the decision to reject or fail to reject the null hypothesis.