According to the UN Statistics, the average life expectancy of Filipinos in 2015 is 71.23 years. A gerontologist suspected that old individual residing in cities tend to live shorter lives. She found that the mean life expectancy of a random sample of 22 urban senior citizens in the Philippines is 69.5 years, with a standard deviation of 7 years. Use the Test of Significance Approach in testing the social gerontologist’s suspicion. a. Estimate μ at 95% confidence interval. b. Did the gerontologist found support for her claim? Why/not? c. Suppose if you live in the city, would you move out based on your findings? Why/not? d. If you drew the wrong conclusion, what type of error would you have committed

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