Given that,
We used for Americans and for chinese
i) The null and the alternative hypotheses are,
Using TI-84 calculator we get,
ii) Test statistic is, Z* = 1.25
iii) p-value = 0.1056
iv) Here, p-value = 0.1056 >
So, we fail to reject the null hypothesis.
conclusion: conclude H0 that the proportion of Americans is NOT larger than the proportion of chinese people who are smiling in their profile pictures.
395 friends are smiling in their profile pictures. Of another independent random sample of 125 American...
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