e. Use the test statistic to make the conclusion (explain why and interpret in context). Experiment 2: Texas Instruments has programmed their calculators with an Automatic Power Down (APD) to turn the calculator off to prolong the life of the batteries if it has not been used for five minutes (300 seconds). The population is normally distributed. Turn your calculator on and leave it alone. Record the time (in seconds) that it takes your calculator to automatically turn off and enter it in the last slot. ------- Conduct a hypothesis test at the .10 level of significance to test the claim that TI calculators turn off in under 300 seconds of non-use. a. Ho: Ha: b. Why is it appropriate to use t to determine the critical value(s) for this hypothesis test? ' Draw a bell curve and shade (or describe) the rejection region