4) A tire manufacturer advertises that their tires last 40,000 miles. A customer questions the claim as being overstated, and does a survey of 100 tires and finds the mean life to be 36,000 with a standard deviation of 3,500 miles. Test the hypotheses at a .10 level.

Ask your question to the AI advisor

Ai-bot is an expert in any field and is the perfect companion for reliable and useful answers and advice on a variety of topics, including science, history, technology, art, sports, health, culture and more.