4.  Is the mean number of days absent of older workers (more than 60 years of age) is greater than young workers (under 21 years of age) and in the fast-food industry?

3. A Caribbean vacation resort recently advertised in Bride Magazine that the cost of a Caribbean wedding was less than $30,000. is it reasonable to conclude the mean wedding cost is less than $30,000 as advertised?

2. Can we conclude that the mean number of patients per day at Hospital in Tangerang, is more than 25?

1. Is there a difference in the mean value of residential real estate sold by male agents and female agents in south Jakarta?