E. A manufacturing firm claims that the batteries used in their electronic games will last an average of 25 hours. To maintain tis average, 15 batteries are tested each month. The computed t- value...

Extracted text: E. A manufacturing firm claims that the batteries used in their electronic games will last an average of 25 hours. To maintain tis average, 15 batteries are tested each month. The computed t- value falls between - to.00s and to.005, the firm is satisfied with its claim. What conclusion should the firm fraw froma sample that has a mean of 23.5 hours and standard deviation s= 3 hours? Assume the distribution of battery lives to be approximately normal.