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Suppose a study claims that only50%of the new born babies in underdeveloped countries have access to vaccines, You suspect the percentage is too low, so you'd like to conduct you own study to check this claim. What is your null and alternative hypothesis ?H0​:p=0.5 v.s. Hn​:p>0.5H0 :p=0.5 v.s. Hn​:pp>0.5H0​:p=0.5 v.s. Hn​:p<0.5​