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If the lifetime X of a certain kind of automobile battery is normally distributed with mean...
The lifetime of the battery of a certain make of cars is normally distributed with mean...
The lifetime of the battery of a certain make of cars is normally distributed with mean 5 years and standard deviation 6 months. An owner of this type of car wants to take a chance and replace the battery at the 3rd quartile of the distribution. In how many months he should have the battery replaced in case the battery lasts until then (round off to the nearest integer)?
After extensive product testing, a battery manufacturer knows that the mean lifetime of its heavy-duty battery...
After extensive product testing, a battery manufacturer knows that the mean lifetime of its heavy-duty battery is normally distributed with a mean of 45 months and a standard deviation of 10 months. (a) The manufacturer currently guarantees free replacement of any battery that fails within 36 months after purchase. What percentage of the batteries should the manufacturer expect to replace? Show your work. Express probabilities in terms of z scores. (b) If the manufacturer wants to replace 10% or fewer...
The lifetime of a certain type of battery is normally distributed with mean value 13 hours...
The lifetime of a certain type of battery is normally distributed with mean value 13 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) X hours
The lifetime of a certain type of battery is normally distributed with mean value 12 hours...
The lifetime of a certain type of battery is normally distributed with mean value 12 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.)
The lifetime of a certain type of battery is normally distributed with mean value 13 hours...
The lifetime of a certain type of battery is normally distributed with mean value 13 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.)
The lifetime of a certain type of battery is normally distributed with mean value 14 hours...
The lifetime of a certain type of battery is normally distributed with mean value 14 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) hours
The lifetime of a certain type of battery is normally distributed with mean value 13 hours...
The lifetime of a certain type of battery is normally distributed with mean value 13 hours and standard deviation 1 hour. There are four batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) xhours Need Help? Read It Talk to a Tutor
15. A certain type of automobile battery is known to have a lifetime which is normally...
15. A certain type of automobile battery is known to have a lifetime which is normally distributed with mean 1,200 days and standard deviation 90 days. For how many days should these batteries be guaranteed if the manufacturer wants to replace only 20% of the batteries sold because they "died" before the guarantee expired? A. 1052 B. 1105 C. 1124 D. 1094 16. A particular television commercial is understood by 30% of first graders and 65% of fourth graders....
The lifetime of a certain type of battery is normally distributed with mean value 10 hours...
The lifetime of a certain type of battery is normally distributed with mean value 10 hours (a) If a pack of 4 batteries is purchased, what is the probability that the average lifetime of the (b) How many batteries must be purchased such that the probability that their average lifetime is at and standard deviation 1 hour batteries in the package is at least 9 hours? least 9.5 hours is .99?
Problem 7: [5 points) The lifetime of a certain type of battery is normally distributed with...
Problem 7: [5 points) The lifetime of a certain type of battery is normally distributed with a mean value of 10 hours and a standard deviation of 1 hour. There are 4 batteries in a package. Question: What lifetime value is such that the total lifetime of all batteries in a package say, X1 + X2 + X3 + X4, exceeds that value for only 2% of all packages?
The lifetime of a certain type of battery is normally distributed with mean value 13 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) X hours
The lifetime of a certain type of battery is normally distributed with mean value 14 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) hours
The lifetime of a certain type of battery is normally distributed with mean value 13 hours and standard deviation 1 hour. There are four batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) xhours Need Help? Read It Talk to a Tutor
The lifetime of a certain type of battery is normally distributed with mean value 10 hours (a) If a pack of 4 batteries is purchased, what is the probability that the average lifetime of the (b) How many batteries must be purchased such that the probability that their average lifetime is at and standard deviation 1 hour batteries in the package is at least 9 hours? least 9.5 hours is .99?
Problem 7: [5 points) The lifetime of a certain type of battery is normally distributed with a mean value of 10 hours and a standard deviation of 1 hour. There are 4 batteries in a package. Question: What lifetime value is such that the total lifetime of all batteries in a package say, X1 + X2 + X3 + X4, exceeds that value for only 2% of all packages?
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