Answer Happy

A survey of American adults asks "Would you like to see more or less government spending on natural disasters?" Of the 1496 respondents, 723 responded "more" or "much more". The proportion of respondents who responded "more" or "much more" is an example of what? O A statistic O A parameter
Why are systematic reviews and meta-analyses considered to provide the best evidence? O Their statistical analyses are complicated They are written by experts in the topic of interest o They include all available information on a particular topic, regardless of where it was obtained from O They objectively summarise all available evidence to answer a specific question using rigorous selection criteria for inclusion of studies