fill in the blank

Fill in the blank below. A researcher wants to show the mean from population 1 is less than the mean from population 2 in matched-pairs data. If the observations from sample 1 are X and the coservations from sample 2 are Y, and d, = X, - Y. then the nut hypothesis is H.: p. =0 and the alternative hypothesis is H,: 1. A researcher wants to show the mean from population 1 is less than the mean from population 2 in matched-pais data, If the observations from sample 1 are X, and the observations from sample 2 are Y, and di = X, - Y,, then the null hypothesis is Hy: Ity = 0 and the alternative hypothesis is H,: H. A