(1 point) Since 1966, 45% of the No. 1 draftpicks in the NBA have been centers. identify the population A. all No.1 draftpick centers in the NBA since 1966 B. all NBA players since 1966 C. all No.1 draftpicks in the NBA since 1966 D. None of the above identify the specified attribute A. being a No.1 draftpicks in the NBA B. being an NBA player C. being a center D. None of the above is the proportion 0.45 (45%) a population proportion or a sample proportion? A. population proportion B. sample proportion C. None of the above