The human resources (HR) manager of a large IT company has collected data for days of the week on which employees were absent from work. The manager randomly selects 150 of the absences, which are shown in the table below. Use α = 0.05 to determine whether these data indicate that absences on the various days of the week are equally likely.

Day of week ............................ Observed frequency
Monday ............................................... 42
Tuesday .............................................. 18
Wednesday ........................................ 24
Thursday ............................................ 27
Friday ................................................. 39
Total .................................................. 150