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A random sample of 25 high-performance halogen headlight bulb shows that the average life span of a bulb is 924 hours wi
Posted: Wed Jul 06, 2022 12:23 pm
by answerhappygod
- A Random Sample Of 25 High Performance Halogen Headlight Bulb Shows That The Average Life Span Of A Bulb Is 924 Hours Wi 1 (26.96 KiB) Viewed 12 times
A random sample of 25 high-performance halogen headlight bulb shows that the average life span of a bulb is 924 hours with a sample standard deviation of 40 hours. Assume the distribution of measurements to be approximately normal. A. Construct a 95% two-sided confidence interval on the mean life. (2 points) B. Construct a 90% lower confidence bound on the mean life. (2 points)