A Pew Research Center poll asked 1708 randomly selected adults in the US whether “global warming is a problem that requires immediate government action.” Results showed that 55% of those said “yes.” What is the sample?单项选择题

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A pharmaceutical company has designed an experiment to test a new arthritis drug.  There were 100 subjects in the initial study. Sixty will receive the drug, 40 will receive the control.  What is the sample?  

In order to study drug use and it's effects on newborn baby weights, babies that were born in three randomly selected states in the US were used in a national study. Two thousand, three hundred and twenty-three babies that were born in those states in 2025 were then randomly selected to be part of the study. Information on each baby was recorded. What is the sample? Sex (male/female) Weight (in grams) Gestation (full term birth/ premature birth) Did the mother use illicit drugs during pregnancy? (yes/no) Did the mother smoke cigarettes during pregnancy? (yes/no) Did the mother have gestational diabetes during pregnancy? (yes/no)

The implementation and loading phase of the Database Life Cycle (DBLC) involves _____.

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