Which sample size out of a population of 1,000 is most likely to lead to a valid conclusion?

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Do graduates from uf tend to have a higher income than students at fsu, five years after graduation? a random sample of 100 graduates was taken from both schools. let muf be the population mean salary at uf and let mufsu be the population mean salary at fsu. how should we write the alternative hypothesis?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

What is the slope of the line shown below?