Z or t StatisticsIf n ≥30 we use Z, if, n < 30 we use t statistics. These statistics can be used to test the hypothesis:
Ho: B = O that is, there is no relationship between X and YHA: B≠ O There is a significant relationship between X and Y
The level of significance is α = 0.05
The degrees of freedom = n-k-1Conclusion:
Reject Ho since computed T > tc. This means that there is a significant relationship between the labour costs and number of units.