The following data represent the time, in seconds, that it took the sand in a sample of timers to run out. At the 10 % significance level, can we conclude that the mean for timers of this type is not equal to the nominal 3 min?

(a) Use H1: μ ≠ 180 as the alternative hypothesis.

(b) Use MINITAB to test (1) H₁: μ ≠ 180 and (2) H₁:μ > 180.

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190 181 199 183 198 208 176 188 180 198 174 165