Question: #28. According to a union agreement, the mean income for all senior-level assembly line workers in a large company equals $500 per week. A representative of a women’s group decides to analyze whether the mean income for female employees matches this norm. For a random sample of nine female employees, \(\bar{Y}=410\) and s = 9. Conduct a significant test of whether the mean income of female employees differs from $500 a week.