Approximately, how may public school systems are there in the United States?

How can descriptive statistics be defined?

a) describing elements of a distribution b) relating the data to a larger population c) developing a research question d) identical to inferential statistics

What did the 17th Amendment to the Constitution accomplish in 1913?

a. Prohibitions on campaign finance reform b. Direct election of Senators c. The right to vote for African Americans d. The right to bear arms