B. The manager wants to find out whether or not there is a significant difference between the daily meal allowances of day and night shift employees in his company. By random sampling, he took a sample of 230 employees from the day shift. These employees were found to have a mean daily allowance Ofh 45. He also took a sample of 200 employees in the night shift. They were found to have a mean daily allowance of EDP. 40. The total population in that school had a standard deviation of 4.5. Is there a signicant difference in the daily allowance of the two groups of employees at 1% level of significance? Hypothesis: Ho: Ha: Level of Significance: o = _ df = CriticalfTabular Value: _ Decision Rule: Test Statistic: Computed Value: Decision: Conclusion