Steve believes that his wife’s cell phone battery does not last as long as his cell phone battery. On six different occa

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Steve believes that his wife’s cell phone battery does not lastas long as his cell phone battery. On six different occasions, hemeasured the length of time his cell phone battery lasted andcalculated that the mean was 24.2 hours with a standard deviationof 5.7 hours. He measured the length of time his wife’s cell phonebattery lasted on ten different occasions and calculated a mean of16.2 hours with a standard deviation of 5.2 hours. Assume that thepopulation variances are the same. Let Population 1 be the batterylife of Steve’s cell phone and Population 2 be the battery life ofhis wife’s cell phone. Step 1 of 2 : Construct a 95% confidenceinterval for the true difference in mean battery life betweenSteve’s cell phone and his wife’s. Round the endpoints of theinterval to one decimal place, if necessary.