Question
A company has developed a new light bulb that seems to burn longer than most residential bulbs. To determine how long these bulbs burn, the
A company has developed a new light bulb that seems to burn longer than most residential bulbs. To determine how long these bulbs burn, the company randomly selects a sample of these bulbs and burns them in the laboratory. The Excel output shown here is a portion of the analysis from this effort. Discuss the output.
Bulb Burn
Mean2198.217Standard deviation152.9907Count84Confidence level (90.0%)27.76691
Appendix A Statistical Tables
(Round the answers to 3 decimal places.)
The 90% confidence interval:
enter an appropriate value rounded to 3 decimal places
enter an appropriate value rounded to 3 decimal places
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