The null hypothesis: H0 : _____ The alternative hypothesis: H1: ______ The type of test statistic: (choose one) _______ The value of the test statistic: ______ (round to at least three decimal places.) The critical value at the 0.1 level of significance: ________ (round to at least three decimal places) Can we support the claim that the mean completion time has decreased under new management? Yes ___, NO _____
An automobile assembly line operation has scheduled mean completion time, µ, of 12.5 minutes. The standard deviation of completion times is 1.2 minutes. It is claimed that, under new management, the mean completion time has decreased. To test this claim, a random sample of 150 completion time under new management was taken. The sample had a mean of 12.3 minutes. Can we support, at the 0.1 level of significance, the claim that the mean completion time has decreased under new management?
Perform a one-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table.
The null hypothesis: H0 : _____
The alternative hypothesis: H1: ______
The type of test statistic: (choose one) _______
The value of the test statistic: ______
(round to at least three decimal places.)
The critical value at the 0.1 level of significance: ________
(round to at least three decimal places)
Can we support the claim that the mean completion time has decreased under new management? Yes ___, NO _____
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