Question: (a) Is there a difference between the mean degree of lateness of company 3 and that of the averages of companies 1 and 2? Test

(a) Is there a difference between the mean degree of lateness of company 3 and that of the averages of companies 1 and 2? Test at the 5% level of significance.
(b) Find a 90% confidence interval for the contrast defined in part (a).

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a The contrast is L 2 3 1 2 An estimate of L is L 20044 0022 0108 0042 ... View full answer

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