What was a major contribution of john muir?

Asocial scientist is interested in determining if there is a significant difference in the proportion of republicans between two areas of town. he takes independent random samples of 200 families in each area of town and a significance test was conducted. the p-value was 0.0156. what should be our conclusions?

The graph shows a demand curve. which most likely accounts for the changes shown on the demand curve?

Does increased security engender feelings of increased safety or does it increase the fears that people have?