A light bulb manufacturer guarantees that the mean life of a certain type of light bulb
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 720 hours. A
random sample of 51 light bulbs as a mean of 701.6 hours with a standard deviation of 62 hours. At an α=0.05, can you support the company’s claim using the test statistic?