a random sample of 10 steel rods from this manu_fac_ture, the ten_sile stren_gths of at le_ast two st_eel ro_ds are over 430 MPa
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The tensile st_ren_gth of a certain type of st_e_el rods produ_ced from a certain manu_facturer
is
that, in a random sample of 10 steel rods from this manu_fac_ture, the ten_sile stren_gths of at le_ast two st_eel ro_ds are over 430 MPa?
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