4. Arbon Computer Corporation (ACC) produces a popular PC clone. The sales manager for ACC has recently read a report that indicated that sales per sales representative for other producers are normally distributed with a mean of $255,000. She is interested in knowing whether her sales staff is comparable. She picked a random sample of 16 salespeople and obtained the following results (c2p4): Person Sales Person Sales 1 177,406 9 110,027 2 339,753 10 182,577 3 310,170 11 177,707 4 175,520 12 154,096 5 293,332 13 236,083 6 323,175 14 301,051 7 144,031 15 158,792 8 279,670 16 140,891