after an extensive advertising campaign, the manager 8 9 10 11 12 13 14 15 16 17

Question

after an extensive advertising campaign, the manager 8 9 10 11 12 13 14 15 16 17 18 19 20 Referring to Scenario 4 and based your calculations, what can be implied in terms of adjusting the machine? Scenario qualty assurance inspector periodically examines the output of a machine to determine if it is properly properly adjusted, the machine produces boards having a mean length of 28.00 inches. In population standard deviation is known and is 1.25 inches For a sample of 85 boards, the mean sted when length is 25 66 inches Assume the Assume Zon values of-1.645 and +1.845. The hypotheses are as follows is normally distributed and assume a 0.10 level of significance -20.00) (rrachre is property apsted) Minimized View The machine is not properly adjusted The machine is properly adjusted We cannot determine if the machine is or is not properly adjusted None of the above Ver: 2.8.29 1 13 Ny 2017 17 3631 9:35:16 PM MST

Explanation / Answer

TS = (Xbar - mean)/(sd/sqrt(n))
= (25.66-26)/(1.25/sqrt(65))
= -2.193

critical value at 0.10 level = 1.645

sin |TS| < critical value
we reject the null hypothesis

and we conclude that the machine is properly adjusted

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