The mean range of the registered voters in a certain municipality is 35. A random sample of 35 registered voters from the same community has a mean age of 37 and the variance is known to be 36. If the field reporter wants to approve that the record is not 35, what is the appropriate null and alternative hypothesis? What is the probability of getting a Type I error? Can we conclude that the mean age is not 35 given a confidence level of 95%?
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