Which theоry within the field оf psychоlogy proposed the principles of perceptuаl orgаnizаtion to explain the way elements are grouped together to create perception?
Tо study sоciаl chаnge, Gаllup periоdically conducts studies to find the percentage (proportion) of US adults who approve of inter-racial marriage. The sample information is as follows. In 2013 survey of 1055 US adults, 887 people approved of inter-racial marriage and in 2021 survey of 1125 US adults, 1058 people approve of inter-racial marriage. The sample proportion of US adults in 2013 who approved of inter-racial marriage is [a] % The sample proportion of US adults in 2021 who approved of inter-racial marriage is [b] % The sample proportion of US adults in 2021 who approved of inter-racial marriage is [c] than the proportion of US adults in 2013. Is this sample information significant enough to claim there has been social change from 2013 to 2021? Can the researchers claim that the proportion of all adults in 2021 who approve of inter-racial marriage is greater than the proportion of adults in 2013? Test their hypothesis at 5% level of significance. Let all US adults in 2021 be population 1, with representing the proportion who approve of inter-racial marriage. Let all US adults in 2013 be population 2, with representing the proportion who approve of inter-racial marriage. Null hypothesis : [d] Alternate hypothesis : [e] p-value of the test is [f]. The p-value is [g] significance level. We [h] sufficient evidence to [i] the null hypothesis and [j] alternate hypothesis. Conclusion: [k] We can claim that proportion of US adults in 2021 who approve of inter-racial marriage is same as than the proportion of US adults in 2013. We can claim that proportion of US adults in 2021 who approve of inter-racial marriage is greater than the proportion of US adults in 2013. We cannot claim that proportion of US adults in 2021 who approve of inter-racial marriage is greater than the proportion of US adults in 2013. We can claim that proportion of US adults in 2023 who approve of inter-racial marriage is lesser than the proportion of US adults in 2013. Save the StatCrunch image showing p-value and upload in next question.