A manufacturer knows that their items lifespans are normally distributed according to N ( 13.1 ,...
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![When x=14, z=(14-13.1)/0.9 = 1 P(Z< 1) =0.8413 [using Normal table or Excel : NORM.S.DIST(1, TRUE)] P(X> 14 ) = 1-PCX < 14) =](http://img.homeworklib.com/questions/be39ebf0-0eed-11eb-af8a-2dff126928ac.png?x-oss-process=image/resize,w_560)
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A manufacturer knows that their items lifespans are normally
distributed according to
N
(
13.1
,...
1) a) A manufacturer knows that their items have a normally distributed length, with a mean...
1) a) A manufacturer knows that their items have a normally distributed length, with a mean of 13.4 inches, and standard deviation of 2 inches. If one item is chosen at random, what is the probability that it is less than 7.5 inches long? b) A manufacturer knows that their items lifespans are normally distributed with mean = 14.2 and standard deviation = 3.9. What proportion of the items' lifespans will be longer than 25 years? c) A particular fruit's...
Assume that the readings at freezing on a batch of thermometers are approximately Normally distributed with...
Assume that the readings at freezing on a batch of thermometers are approximately Normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Find the proportion of thermometers with a reading outside of the interval -1.35°C and 1.35°C. Upload your image here: Edit Insert Formats Enter your final answer below, Round to 4 decimal places.
Assume that the readings at freezing on a batch of thermometers are approximately Normally distributed with...
Assume that the readings at freezing on a batch of thermometers are approximately Normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Find the proportion of thermometers with a reading greater than -1.22°C. For this question and the next several, please upload the image of the normal curve with the appropriate area shaded, include the calculator command used. See the instructions for some examples. Upload your image here: Edit Insert Formats Enter your final answer below,...
A manufacturer knows that their items have a normally distributed length, with a mean of 18...
A manufacturer knows that their items have a normally distributed length, with a mean of 18 inches, and standard deviation of 5.7 inches. If one item is chosen at random, what is the probability that it is less than 13 inches long? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.7 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2 years, and standard deviation of 0.7 years. If you randomly purchase 23 items, what is the probability that their mean life will be longer than 2 years? (Give answer to 4 decimal places.)
4. A manufacturer knows that their items have a normally distributed lifespan, with a mean of...
4. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.4 years, and standard deviation of 3.2 years. If you randomly purchase 21 items, what is the probability that their mean life will be longer than 15 years? (Give answer to 4 decimal places.) 5. A particular fruit's weights are normally distributed, with a mean of 704 grams and a standard deviation of 12 grams. If you pick 12 fruit at random, what is...
Question 3: a.) A manufacturer knows that their items have a normally distributed length, with a...
Question 3: a.) A manufacturer knows that their items have a normally distributed length, with a mean of 19.6 inches, and standard deviation of 2.4 inches. If 4 items are chosen at random, what is the probability that their mean length is less than 17.5 inches? b.) A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 0.7 years. If you randomly purchase 14 items, what is the probability...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years, and standard deviation of 2.5 years. If you randomly purchase one item, what is the probability it will last longer than 20 years? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.8 years, and standard deviation of 1.9 years. The 5% of items with the shortest lifespan will last less than how many years?
1) A manufacturer knows that their items have a normally distributed length, with a mean of...
1) A manufacturer knows that their items have a normally distributed length, with a mean of 11.9 inches, and standard deviation of 1.4 inches. If 15 items are chosen at random, what is the probability that their mean length is less than 12.4 inches? 2) A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.2 years, and standard deviation of 0.8 years. If you randomly purchase 2 items, what is the probability that their...
2786 · Question 10 A manufacturer knows that their items have a normally distributed lifespan, with...
2786 · Question 10 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.6 years, and standard deviation of 1.3 years. If you randomly purchase one item, what is the probability it will last longer than 12 years? . Question 11 A survey of 1700 workers and retirees in the United States of age 25 years and older conducted by Employee Benefit Research Institute in January 2010 found that 714 had less than $10,000...
2786 · Question 10 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.6 years, and standard deviation of 1.3 years. If you randomly purchase one item, what is the probability it will last longer than 12 years? . Question 11 A survey of 1700 workers and retirees in the United States of age 25 years and older conducted by Employee Benefit Research Institute in January 2010 found that 714 had less than $10,000...
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