(Solution) - For each population and sample determine what value of sample -(2025 Original AI-Free Solution)

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For each population and sample, determine what value of sample means would indicate a significant event two standard deviations from the population mean.
a. ? = 80, ? = 10, sample size n = 25
b. ? = 130, ? = 6, sample size n = 36
c. ? = 18, ? = 2, sample size n = 64
d. ? = 0.52, ? = 0.1, sample size n = 100