computer company claims that the lifespan of its batteries is mpre than 3.7 years. The population standard deviation is 0.7 years. A sample of 35 batteries was tested, and their mean lifespan was 4.3...

Extracted text: computer company claims that the lifespan of its batteries is mpre than 3.7 years. The population standard deviation is 0.7 years. A sample of 35 batteries was tested, and their mean lifespan was 4.3 years. Using a 90% confidence level, determine if the company's claim is correct. Show word count ( Previous Next