Hey Everyone! New SAS user here and I'm hoping you can help me solve a problem. In brief, I have a dataset where I need to compare the mean weight of two species of mouse. Moreover, I'm not simply testing whether or not they're different but rather, does the difference of their mean weight exceed 7 grams? Symbolically, my hypotheses may be stated as: Ho: |µ1 - µ2| ≤ 7 or µD ≤ 7 Ha: |µ1 - µ2| > 7 or µD > 7 My question is, how do I translate this into SAS code? I found some documentation about the H0 option in proc ttest but I'm unsure about whether I've implemented it correctly for a two-sided test and I'm definitely unsure on how to ask a 1-sided question. At present my code looks something like: data weight;
input species_1 species_2;
cards;
22 36
18 24
23 34
22 24
14 37
15 34
;
run;
data weight2;
set weight;
weight = species_1;
species = 1;
output;
weight = species_2;
species = 2;
output;
drop species_1 species_2;
run;
proc sort data=weight2;
by species;
run;
proc ttest data=weight2 H0 = 7;
class species;
var weight;
run; Any advice you all can offer would be much appreciated! Thank you in advance!
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