The life spans of car batteries are normally distributed, with a mean of 62 months and...
The life spans of car batteries are normally distributed, with a mean of 62 months and a standard deviation of 5 months.
(a) Find the probability that the life span of a randomly selected battery is less than 42 months.
(b) Find the probability that the life span of a randomly selected battery is between 44 and 56 months.
(c) What is the shortest life expectancy a car battery can have and still be in the top 5% of life expectancies?
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The life spans of car batteries are normally distributed, with a
mean of 62 months and...
minitab Can anyone help me with minitab question? The life spans of car batteries are normally...
minitab Can anyone help me with minitab question? The life spans of car batteries are normally distributed, with a mean of 44 months and a standard deviation of 5 months. A car battery is selected at random. Find the probability that the life span of the battery is less than 36 months. What is the shortest life expectancy a car battery can have and still be in the top 5% of life expectancies?
The life time of the batteries manufactured by LG is normally distributed with a mean of...
The life time of the batteries manufactured by LG is normally distributed with a mean of 60 months and a standard deviation of 10 months. (i) Find the percentage of batteries whose life time is less than 20 months. (ii) Find the percentage of batteries whose life time exceeds 70 months. (iii) How many batteries whose life time ranges from 45 to 75 months in a year when there is a production 5000 batteries in a year?
The life span of a battery is normally distributed, with a mean of 2000 hours and...
The life span of a battery is normally distributed, with a mean of 2000 hours and a standard deviation of 50 hours. A) What percent of batteries have a life span that is more than 2080 hours? B) Would it be unusual for a battery to have a life span that is more than 2080 hours? [Explain your reasoning.] What percent of batteries have a life span that is more than 2080 hours? Approximately ___% of batteries have a life...
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows...
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life time(x) of a Quick Start battery is normally distributed with a mean of 45 months and a standard deviation of 8 months. What is the probability that a randomly picked 12-volt car battery that was produced by Quick Start Company has a life time that is less than 36 months?
NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span...
NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Assume that the lifetime is distributed approximately normally. What is the probability of getting a battery with lifetime16 hours or less? (Round to 3 decimal places) NeverReady batteries has engineered a newer, longer-lasting AAA battery. This battery has an average life span of 17 hours with a standard deviation of 0.8 hours. Assume that...
3. The life expectancy of computer terminals is normally distributed with a mean of 5.2 years...
3. The life expectancy of computer terminals is normally distributed with a mean of 5.2 years and a standard deviation of 8 months (2/3 years). Please answer the following questions. (a) What is the probability that a randomly selected terminal will last more than 6 years? (b) What percentage of terminals will last between 3.5 and 5.5 years?
Question 4 A manufacturer of car batteries claims that the life of his batteries is approximately...
Question 4 A manufacturer of car batteries claims that the life of his batteries is approximately normally distributed with a mean life of 7 years and a standard deviation equal to 2 year. What is the probability that a battery last between 1 and 13 years? a. p = 0.9974 b. p =0.74 c. p = 0.99 d. p = -0.9974
3) A car manufacturer knows that the service life (in months) of the emission sensors in...
3) A car manufacturer knows that the service life (in months) of the emission sensors in its cars is normally distributed with a mean of 72 and standard deviation of 9. (a) (5 points) What is the probability that the sensors will fail within 5 years in a randomly selected car?
The life of a certain AAA batteries is normally distributed with a variance of 100 hours...
The life of a certain AAA batteries is normally distributed with a variance of 100 hours and mean of 550 hours. Find the probability that a battery chosen at random will last no more than 568 hours
4. A top brand of a popular pickup truck's life is normally distributed with its mean,...
4. A top brand of a popular pickup truck's life is normally distributed with its mean, 12 years and standard deviation, 4 years. Suppose that the top executives of the automaker decided that only 1.2% of new trucks sold could be replaced with a new truck or fully refunded within the warranty period. What should be a desirable warranty period? 5. The grade distribution of a basic English course in a high school (total 3500 students) is normally distributed with...
3) A car manufacturer knows that the service life (in months) of the emission sensors in its cars is normally distributed with a mean of 72 and standard deviation of 9. (a) (5 points) What is the probability that the sensors will fail within 5 years in a randomly selected car?
4. A top brand of a popular pickup truck's life is normally distributed with its mean, 12 years and standard deviation, 4 years. Suppose that the top executives of the automaker decided that only 1.2% of new trucks sold could be replaced with a new truck or fully refunded within the warranty period. What should be a desirable warranty period? 5. The grade distribution of a basic English course in a high school (total 3500 students) is normally distributed with...
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