A lightbulb manufacturer claims that their bulbs last 8,000 hours on average. Assume lightbulb lifespan is normally distributed. A sample of 10 bulbs is collected and tested until failure. The sample...

Extracted text: A lightbulb manufacturer claims that their bulbs last 8,000 hours on average. Assume lightbulb lifespan is normally distributed. A sample of 10 bulbs is collected and tested until failure. The sample dataset is as follows given in hours of run time until burnout for each lightbulb: 7520, 8130, 7860, 8290, 8010, 7640, 7100, 8480, 8220, 8260 You are to test the hypothesis Ho:H= 8000- Calculate your test statistic. Answer accuracy to 3 decimal places.