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Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.5 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 980 samples is 4.6ppm. Assume the variance is known to be 1.44. Does the data support the claim at the 0.05 level? Step 1 of 5 : Enter the hypotheses: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.5 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 980 samples is 4.6ppm. Assume the variance is known to be 1.44. Does the data support the claim at the 0.05 level? Step 2 of 5: Enter the value of the z test statistic. Round your answer to two decimal places. Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.5parts/million(ppm).A researcher believes that the current ozone level is at an excess level. The mean of 980 samples is 4.6pprn. Assume the variance is known to be 1.44. Does the data support the claim at the 0.05 level? Step 3 of 5 : Specify if the test is onetailed or two-tailed. Answer 2 Points Keyboard Shortcut: One-Talled Test Two-Tailed Test Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.5 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 980 samples is 4.6 ppm. Assume the variance is known to be 1.44. Does the data support the claim at the 0.05 level? Step 4 of 5: Enter the decision rule. Answeritnw to enter yow anwer (opens in Atwwndow) 2 Points Keyboard shortcut Reject H0 if 2> Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 4.5 parts/million (ppm). A researcher believes that the current ozone level is at an excess level. The mean of 980 samples is 4.6 ppm. Assume the variance is known to be 1.44. Does the data support the claim at the 0.05 level? Step 5 of 5 : Enter the conclusion. Answer 2 Points Keyboard Shortcuts Reject Null Hypothesis Fail to Reject Null Hypothesis