Hypothesis testing (pls help me with this one)

Answer:
Her hypothesis is wrong, since there is only about a 2,38% difference which is not significant. She is a treehugger.
Step-by-step explanation:
if you sum all of these items and divide by their number (23) you're gonna get an average of ~482.48 acres
now, let's see if it's above the 5% significant:
482.48 ----- 100%
471 --------- x%
482.48x = 47100
x = 47100/482.48
x = ~97.62%
100 - 97.62 = ~2,38%