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A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. The proportion of light bulbs that last 50 hours or less is ?
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 61 hours? (b) What proportion of light bulbs will last 52 hours or less? (c) What proportion of light bulbs will last between 57 and 61 hours? (d) What is the probability that a randomly selected light bulb lasts...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 61 hours? (b) What proportion of light bulbs will last 51 hours or less? (c) What proportion of light bulbs will last between 59 and 61 hours? (d) What is the probability that a randomly selected light bulb lasts...
In a large industrial complex, the maintenance department has been instructed to replace light bulbs before...
In a large industrial complex, the maintenance department has been instructed to replace light bulbs before they burn out. It is known that the life of light bulbs is normally distributed with a mean life of 1600 hours of use and a standard deviation of 150 hours. When should the light bulbs be replaced so that no more than 85% of them burn out while in use?
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information answer the following questions. (a) What proportion of light bulbs will last more than 62 hours? (b) What proportion of light bulbs will last 50 hours or less? (c) What proportion of light bulbs will last between 58 and 62 hours? (d) What is the probability that a randomly selected light bulb lasts...
please please please answer every one of the questions as I have no more questions remaining....
please please please answer every one of the questions as I have
no more questions remaining.
-/10 points MendSc8t14 6.E 039. My Notes Ask Your Let x be a binomial random variable with n = 100 and ρ = 0.2. Find approximations to these probabilities. (Round your answers to four decimal places.) (a) Px> 29) (d) PIx S 31) You may need to use the appropriate appendix table or technology to answer this question. Need Help? -/10 points MendScat14 6.E...
GPAs at CCCOnline are normally distributed with a mean of 2.25 and a standard deviation of...
GPAs at CCCOnline are normally distributed with a mean of 2.25 and a standard deviation of 0.46. Find the z-score for a GPA of 3.13. 1.087 1.804 0.8478 1.913 1.261 1.109 Adult men have heights with a mean of 69.0 inches and a standard deviation of 8 inches. Find the z-score of a man 76.9 inches tall. (to 2 decimal places) The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs....
9. In a large discount store, the maintenance department has been instructed to replace all of...
9. In a large discount store, the maintenance department has been instructed to replace all of the light bulbs at the same time. Past experience indicates that the lives of light bulbs are normally distributed with a mean life of 1250 hours and standard deviation of 70 hours. When should the lights be replaced so that no more than 11.5% burned out? Draw diagram for normal distribution, define the time of bulb replacement that separates the bottom 11.5% and circle...
1950 -10 9. In a large discount store, the maintenance department has been instructed to replace...
1950 -10 9. In a large discount store, the maintenance department has been instructed to replace all of the light bulbs at the same time. Past experience indicates that the lives of light bulbs are normally distributed with a mean life of 1250 hours and standard deviation of 70 ho hould the lights be replaced so that no more than 11.5% burned out? Draw diagram For normal distribution, define the time of bulb replacement that separates tom 11.5% and circle...
t a computer manufacturing company, the actual size of computer chips is normally distributed with a...
t a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 10 centimeter and a standard deviation of 2.1 centimeter. A random sample of 24 computer chips is taken. What is the probability that the sample 2. A mean will be between 10.95 and 11.05 centimeters? The personnel director of a large corporation wants to study absenteeism among clerical workers at the corporation's central office during the year. A random sample of 25...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 61 hours? (b) What proportion of light bulbs will last 52 hours or less? (c) What proportion of light bulbs will last between 57 and 61 hours? (d) What is the probability that a randomly selected light bulb lasts...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 61 hours? (b) What proportion of light bulbs will last 51 hours or less? (c) What proportion of light bulbs will last between 59 and 61 hours? (d) What is the probability that a randomly selected light bulb lasts...
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57 hours and a standard deviation of 3.5 hours. With this information answer the following questions. (a) What proportion of light bulbs will last more than 62 hours? (b) What proportion of light bulbs will last 50 hours or less? (c) What proportion of light bulbs will last between 58 and 62 hours? (d) What is the probability that a randomly selected light bulb lasts...
please please please answer every one of the questions as I have
no more questions remaining.
-/10 points MendSc8t14 6.E 039. My Notes Ask Your Let x be a binomial random variable with n = 100 and ρ = 0.2. Find approximations to these probabilities. (Round your answers to four decimal places.) (a) Px> 29) (d) PIx S 31) You may need to use the appropriate appendix table or technology to answer this question. Need Help? -/10 points MendScat14 6.E...
9. In a large discount store, the maintenance department has been instructed to replace all of the light bulbs at the same time. Past experience indicates that the lives of light bulbs are normally distributed with a mean life of 1250 hours and standard deviation of 70 hours. When should the lights be replaced so that no more than 11.5% burned out? Draw diagram for normal distribution, define the time of bulb replacement that separates the bottom 11.5% and circle...
1950 -10 9. In a large discount store, the maintenance department has been instructed to replace all of the light bulbs at the same time. Past experience indicates that the lives of light bulbs are normally distributed with a mean life of 1250 hours and standard deviation of 70 ho hould the lights be replaced so that no more than 11.5% burned out? Draw diagram For normal distribution, define the time of bulb replacement that separates tom 11.5% and circle...
t a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 10 centimeter and a standard deviation of 2.1 centimeter. A random sample of 24 computer chips is taken. What is the probability that the sample 2. A mean will be between 10.95 and 11.05 centimeters? The personnel director of a large corporation wants to study absenteeism among clerical workers at the corporation's central office during the year. A random sample of 25...
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