highly significantP < 0.0018
These differences were highly significant (0.0001 < P < 0.0018) in the C57BL/6, 129S6 and BALB/c backgrounds, but less so in the CBA/Ca background (0.017 < P < 0.048), and not significant for the specific comparison of the CBA/Ca homozygotes at 32 and 16 kHz ( P = 0.11).