Determine whether the following situations has a known or unknown population variance. (NO NEED FOR EXPLANATION THANK YOU) Given the population mean of 12, and a sample standard deviation of 3 in a sample size of 125 The mean height of the students at Maligaya Elementary School is 137.16 cm. To find out if the statement is true, a sample of 15 students is taken from the population. The mean of the sample is 139.1 cm with a standard deviation of 2.23 cm

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