[問題] 假設檢定
Some nurses in County Public Health conducted a
survey of women who had received inadequate prenatal
care. They used information from birth certificates
to select mothers for the survey. The mothers that
were divided into two groups : 14 mothers who said
they had 5 or fewer prenatal visits and 14 mothers
who who said they had 6 or more prenatal visits.
Let X and Y equal the respective birthweights of
the babies from these two sets of mothers and assume
that the distribution of X is N(μx,σ^2)and the
distribution of Y is N(μy,σ^2).
請問如果我假設H0:μx-μy=0
那我H1要怎麼假設？
是要設小於0還是大於0？
我承認有點不懂題意
是要實驗孕婦在懷孕期間受到關照程度
來跟嬰兒體重看是否有顯著差異嗎？
請教高手
謝謝
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