A medical researcher measured the pulse rates​ (beats per​ minute) of a sample of randomly selected adults and found the following​ Student's t-based confidence​ interval: With 95​% ​Confidence, ​63.966232 (Pulse) < 67.369042 ​a) Explain carefully what the software output means.
​b) What's the margin of error for this​ interval?
​c) If the researcher had calculated a ​% confidence​ interval, would the margin of error be larger or​ smaller?

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Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables