A certain pen has been designed so that true average writing lifetime

A certain pen has been designed so that true average writing lifetime under controlled conditions (involving the use of a writing machine) is at least 10 hr. A random sample of17 pens is selected, the writing lifetime of each is determined, and a normal probability plot of the resulting data support the use of a one-samplet test. The relevant hypotheses areH0:? = 10 versusHa:? < 10.(a) If t = -2.4 and ? = .05 is selected, what conclusion is appropriate? RejectFail to reject (b) If t = -1.93 and ? = .01 is selected, what conclusion is appropriate? RejectFail to reject (c) If t = 0.27, what conclusion is appropriate? RejectFail to reject

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