A headlight company claims that the average headlight they produce lasts 300 days. A scientist randomly selects 15 headlights. The sample mean is...

20. A headlight company claims that the average headlight they produce lasts 300 days. A scientist randomly selects 15 headlights. The sample mean is 290 days, with a standard deviation of 50 days. If the company’s claim were true, what is the probability that 15 randomly selected headlights would have an average life of no more than 290 days?: * a. 0.100 b. 0.226 c. 0.443 d. 0.77520. A headlight company claims that the average headlight they produce lasts 300 days. A scientist randomly selects 15 headlights. The sample mean is 290 days, with a standard deviation of 50 days. If the company’s claim were true, what is the probability that 15 randomly selected headlights would have an average life of no more than 290 days?: * a. 0.100 b. 0.226 c. 0.443 d. 0.77520. A headlight company claims that the average headlight they produce lasts 300 days. A scientist randomly selects 15 headlights. The sample mean is 290 days, with a standard deviation of 50 days. If the company’s claim were true, what is the probability that 15 randomly selected headlights would have an average life of no more than 290 days?: * a. 0.100 b. 0.226 c. 0.443 d. 0.775