Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of 25 AAA batteries produced by this manufacturer lasted a mean of 9.9 hours with a standard deviation of 1.9 hours. Find a 99% confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then give its lower limit and upper limit. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.)

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Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it
produces. A random sample of 25 AAA batteries produced by this manufacturer lasted a mean of 9.9 hours with a standard deviation of 1.9 hours. Find a 99%
confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then give its lower limit and upper
limit.
Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of
formulas.)
Lower limit:
Upper limit:
Continue
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GES
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Transcribed Image Text:Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of 25 AAA batteries produced by this manufacturer lasted a mean of 9.9 hours with a standard deviation of 1.9 hours. Find a 99% confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then give its lower limit and upper limit. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: Upper limit: Continue X S o GES 6 Submit Assignment 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility Aug 18 ?
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