Question 1051193
Ho: p=0.35
Ha: p>0.35 claim
sample proportion = p-hat = 120/300 = 0.4
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test stat:: z(0.4) = (.4-.35)/sqrt[0.4*0.6/300] = 1.8
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p-value = P(z > 1.8) = 0.0359
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.0359< .05
Conclusion: 
Since the p-value is less than 5%, reject Ho.
Evidence supports the claim that the proportion of adults who support more gun
 control laws in 2015 is higher than 3 years ago