A company has developed a new type of lightbulb, and wants to estimate its mean lifetime. A
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A company has developed a new type of lightbulb, and wants to estimate its mean lifetime. A simple random sample of 100 bulbs had a sample mean lifetime of 750.2 hours with a sample standard deviation of 30 hours. Construct a 95% confidence interval for the population mean lifetime of all bulbs manufactured by this new process.
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Muhammad Umair
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