Quant Convariance Stationary question(Schweser Qbank Questio question, territory, different, test

tarunajwani

can someone tell me how to do question B? there’s no confidence interval given in this problem. I was going to test if b1=1 by using (1.0926-1)/0.0673, and then test if the T-calc is significant different from 0. but without level of significance given, how am i supposed to look up the T table?
Albert Morris, CFA, is evaluating the results of an estimation of the number of wireless phone minutes used on a quarterly basis within the territory of Car-tel International, Inc. Some of the information is presented below (in billions of minutes):
Wireless Phone Minutes (WPM)t = bo + b1 WPMt-1 + ?