A study was conducted to investigate some effects of physical training.  Sample data are given below with all weights given in kilograms.  Pre training:     98          57          62          69          74          77          59          92              70          85 Post training:   94          57          62          69          66          76          58          88              70          84 At 1% significance level test whether the mean of the Post training weight is less than that of pre-training weight. What type of error could you have made in your decision.

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