Mathematics, 30.04.2021 15:20 Symonek
In a local community, assume ages are normally distributed with a standard deviation of 20. In order to estimate the average age of people in the community, the following sample is taken: 78, 63, 75, 42, 55, 70, 68, 62, 53, 49. The mean of these data is 60.50. The lower bound of the 95% confidence interval for the mean age is 48.10. What is the upper bound for the 95% confidence interval
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