Historically, a Bank Has Employed 50% Permanent Full-Time Workers, 25 $\alpha$

Essay

Historically, a bank has employed 50% permanent full-time workers, 25% permanent part-time workers, 15% temporary full-time workers, and 10% temporary part-time workers. In a recent sample of 400 workers, 190 were permanent full-time, 125 were permanent part-time, 55 were temporary full-time, and 30 were temporary part-time. Use these data and $\alpha$ = 0.05 to assess whether there has been a change from the historical percentages.