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model s=age;
mean age;
proc glm data=phone;
class money;
model s=money;
mean money;
proc glm data=phone;
class hp_model;
model s=hp_model;
mean hp_model;
proc freq data=phone;
tables sex*top_brand/chisq expected nocol nerow nopercent;
tables age*top_brand/chisq expected nocol nerow nopercent;
tables
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