(p. 77). Recall that the researchers developed a detector of malicious attacks on data traveling through the network. Using code, they created 160 normal (i.e., honest) data packets on the network and 130 maliciously attacked data packets. A key detection variable was the size (number of bytes) of a traveling data packet. The sizes of all 290 data packets are saved in the ATTACK file. Of interest is a comparison of the mean sizes of normal and attacked data packets. Use the accompanying StatCrunch printout to make the comparison. Is there evidence to indicate that the mean size of normal data packets differs from the mean size of attacked data packets?