one feature smartphone manufacturers use in adverusing Is the amount of time one can talk before recharging the battery. Below are 13 values from a random sample of the talk-time (in minutes) of smartphones running on lithium-ion batteries. 316 358 739 606 1058 910 358 476 441 441 680 441 473 We wish to test whether the data provide evidence that the mean talk time is lower than 680 minutes. Use a 5% level of significance. Provide decision and conclusion for the significance test. One-Sample T: rtime 90% Upper Bound N Mean StDev SE Mean for u 13 561.3 226.8 62.9 646.6 If mean of rtime Test Null hypothesis H : U = 680 K 'Alternative hypothesis.H,: u