Fluorescent lighbulbs have lifetimes that are normally distributed with a mean of 5.1 years and a...
Fluorescent lighbulbs have lifetimes that are normally
distributed with a mean of 5.1 years and a standard deviation of 1
years. The figure below shows the distribution of lifetimes of
fluorescent lightbulbs. Calculate the shaded area under the curve.
Express your answer in decimal form with at least two
decimal place accuracy.
Answer:
The numbers on the diagram are 4.43 and 7.1.
Homework Answers
The statistical software output for this problem is:
From above output:
Shaded area = 0.7258
Add Answer to:
Fluorescent lighbulbs have lifetimes that are normally
distributed with a mean of 5.1 years and a...
(1 point) Scores on a standardized exam are normally distributed with a mean of 539 and...
(1 point) Scores on a standardized exam are normally distributed with a mean of 539 and a standard deviation of 99. The figure below shows the distribution of the scores on a standardized exam. Calculate the shaded area under the curve. Express your answer in decimal form with at least two decimal place accuracy Answer 472.67 137 The Scores on a Standardized Exan
(1 point) Length of skateboards in a skateshop are normally distributed with a mean of 31.9...
(1 point) Length of skateboards in a skateshop are normally distributed with a mean of 31.9 in and a standard deviation of 0.4 in. The figure below shows the distribution of the length of skateboards in a skateshop. Calculate the shaded area under the curve. Express your answer in decimal form with three decimal place accuracy. Answer: 31.632 32.7 The Length of Skateboards in a Skateshop
(1 point) The shelf life of a batteries produced by one major company are normally distributed...
(1 point) The shelf life of a batteries produced by one major company are normally distributed with a mean of 4.5 years and a standard deviation of 0.6 years. The figure below shows the distribution of shelf lives of batteries produced by one major company. Calculate the shaded area under the curve. Express your answer in decimal form with at least two decimal place accuracy. Answer: 3.9 4.982 Shelf Lives of Batteries Produced by One Major Conpany
(1 point) The shelf life of a batteries produced by one major company are normally distributed...
(1 point) The shelf life of a batteries produced by one major company are normally distributed with a mean of 4.1 years and a standard deviation of 0.2 years. The figure below shows the distribution of shelf lives of batteries produced by one major company Calculate the shaded area unde the curve. Express your answer in decimal form with three decimals of accuracy. Answer: 9938 3.966 Shelf Lives of Batteries Produced by One Hajor Company
Fluorescent lighbulbs have lifetimes that follow a normal distribution, with an average life of 1,725 days...
Fluorescent lighbulbs have lifetimes that follow a normal distribution, with an average life of 1,725 days and a standard deviation of 1,462 hours. In the production process the manufacturer draws random samples of 215 lightbulbs and determines the mean lifetime of the sample. What would be the standard deviation, in hours, of the sampling distribution? Std. dev. of sample means (1 decimal place):
Suppose that the lifetimes of tires of a certain brand are normally distributed with a mean...
Suppose that the lifetimes of tires of a certain brand are normally distributed with a mean of 74,000 miles and a standard deviation of o miles. These tires come with a 55,000-mile warranty. The manufacturer of the tires can adjust o during the production process, but the adjustment of o is quite costly. The manufacturer wants to set o once and for all so that only 1% of the tires will fail before warranty expires. Find the standard deviation to...
A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of...
A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and a standard deviation of 50 hours. To minimize the number of bulbs that burn out during operating hours, all bulbs are replaced at once. How often should the bulbs be replaced so that no more than 1% burn out between the replacement periods? 884 584 501 O 484 381
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Assume that the random wable X is normally distributed, with mean y 59 and standard deviation - 14. Compute the probability P/55X570) Be sure to draw a normal curve with the area corresponding to the probability shaded Click here to view the standardnom distrution table nagell. Gick here to hundred Draw a normal curve with the area corresponding to the probability shaded Choose the correct OA OC OD 70 The probability P156X670) Round to four decimal place anded
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Assume that the random variable X is normally distributed, with mean 60 and standard deviation - 14. Compute the probability P156X565) Be sure to draw a normal curve the corresponding to the probability shaded Click here to view the standard normal distribution table (page 1) Click here to view the standard normaltaistribution table (page 21 Draw a normal curve with the area corresponding to the probability shaded. Choose the correct graph below ОА ОВ. Ос. OD 5606 The probability P(56<X266)...
(1 point) Scores on a standardized exam are normally distributed with a mean of 539 and a standard deviation of 99. The figure below shows the distribution of the scores on a standardized exam. Calculate the shaded area under the curve. Express your answer in decimal form with at least two decimal place accuracy Answer 472.67 137 The Scores on a Standardized Exan
(1 point) Length of skateboards in a skateshop are normally distributed with a mean of 31.9 in and a standard deviation of 0.4 in. The figure below shows the distribution of the length of skateboards in a skateshop. Calculate the shaded area under the curve. Express your answer in decimal form with three decimal place accuracy. Answer: 31.632 32.7 The Length of Skateboards in a Skateshop
(1 point) The shelf life of a batteries produced by one major company are normally distributed with a mean of 4.5 years and a standard deviation of 0.6 years. The figure below shows the distribution of shelf lives of batteries produced by one major company. Calculate the shaded area under the curve. Express your answer in decimal form with at least two decimal place accuracy. Answer: 3.9 4.982 Shelf Lives of Batteries Produced by One Major Conpany
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A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1000 hours and a standard deviation of 50 hours. To minimize the number of bulbs that burn out during operating hours, all bulbs are replaced at once. How often should the bulbs be replaced so that no more than 1% burn out between the replacement periods? 884 584 501 O 484 381
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