age 1: Question 2 (1 point) Listen in former data the mean life of a lightbulb is 90.6 hours. The lightbulb maker has started to use a new manufacturing method and wants to know if there has a been a age 2: change in the average population mean life time of the lightbulbs. The null (H 2 naught) and alternative (H alternative) hypothesis are: ONone of the above age 3: OHo : ML > 90. 6 Ha : ( > 90. 6 ge 4: OHo : M # 90. 6 Ha : M = 90. 6 ge 5: OHo : M = 90. 6 6 7 Ha : / > 90. 6 9 10 OHo : M > 90. 6 Ha : u = 90. 6