s a pot of 1500 ashuts in Jhuly 2010, 765 af those pelled said that schools shou

Question

s a pot of 1500 ashuts in Jhuly 2010, 765 af those pelled said that schools should ban sugary snacks and soft drinks Complete parts a and b below Find the value of the test statsaic z Z (Round to two decimal places as needed ) Find the value of the coresponding p-value for this test statistic z pvahe-(Round to three decinal places s needed ) Do you raject or not reject the null hypothesis? b Choose the best interpretation of the results you obtalned in part a 0 A. The percentage of al aduts who favor barring is signiicandy more than 50% Click to select your answer's) o o.e-e .wa. ype here to search

Explanation / Answer

Solution:-
a) hypotheses:
H0: p=0.5

H1: p>0.5
  
=> p-hat = 765/1500 = 0.51
  
=> z = (0.51-0.5)/sqrt(0.5*(1-0.5)/1500) = 0.77

=> p - value = 0.221

=> Do not reject H0

=> option B. the percentage of all adults who favour banning is not significantly more than 50%

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