Suppose that the working life of a motor follows a normal distribution with an average life...
- Suppose that the working life of a motor follows a normal distribution with an average life of 11 years and a standard deviation of 8 years. The manufacturer replaces without any extra charge all motors that experiment failure within the period of guarantee.
a.What is the probability that a motor fails after 15 years of use?
b. A contractor buys 500 motors. What is the probability that 90 motors from the motors he bought have a life of more than 15 years?
c. If the manufacturer wishes to replace only the 3% of motors sold, what is the time of guarantee that should be offered?
Homework Answers
Add Answer to:
Suppose that the working life of a motor follows a normal
distribution with an average life...
The average life of a certain type of small motor is 10 years with a standard...
The average life of a certain type of small motor is 10 years with a standard deviation of 2 years. The manufacturer replaces free all motors that fail while under guarantee. If she is willing to replace only 3% of the motors that fail, how long a guarantee should be offered? Assume that the lifetime of a motor follows a normal distribution.
The average life of a certain type of small motor is 10 years with a standard...
The average life of a certain type of small motor is 10 years with a standard deviation of 2 years. The manufacturer replaces free all motors that fail while under guarantee. If she is willing to replace 3% of the motors that fail, how long a guarantee (in years) should she offer? You may assume that the lives of the batteries are normally distributed. A properly labeled figure of the normal distribution curve and x and z values is required...
The lifetime of a particular brand of television follows the exponential distribution and has an average...
The lifetime of a particular brand of television follows the exponential distribution and has an average lifetime of 7 years. If the manufacturer provided a warranty that replaces any television that fails within one year, what proportion of televisions will the manufacturer need to replace?
A company produces refrigerator motors. These engines have a life expectancy of 19.4 years with a...
A company produces refrigerator motors. These engines have a life expectancy of 19.4 years with a standard deviation of 4.8 years. Assume that the service life of the motors is normally distributed. In order to promote the sale of its engines, the company wants to go out with a guarantee on the engines which assumes that the customer can replace the engine free of charge if it breaks before a certain time. b) How many years of warranty can the...
The average life of a certain type of small engine is 10 years, with a standard...
The average life of a certain type of small engine is 10 years, with a standard deviation of 2 years. The manufacturer replaces for free all motors that fail within the warranty period. If you were willing to replace only 3% of failed engines, how long a warranty should you offer? Suppose that the duration of an engine follows a normal distribution. Answer with 4 decimals.
The life of automobile voltage regulators follows an exponential distribution with an average of 6 years....
The life of automobile voltage regulators follows an exponential distribution with an average of 6 years. You buy a car with 6 years of use, with a voltage regulator that is functional, and plan to stay with the vehicle for an additional 6 years. a) What is the probability that the voltage regulator will fail during the time that you kept the car? b) If the regulator fails 3 years after you bought the vehicle and it is replaced, what...
Students must show work to receive full credit. 1. Differentiate “Empirical Probability” and “Classical Probability”. 2....
Students must show work to receive full credit. 1. Differentiate “Empirical Probability” and “Classical Probability”. 2. Define “Independent Events”, “Mutually Exclusive Events”, and “Collectively Exhaustive Events”. 3. Suppose there are 15 red marbles and 5 blue marbles in a box. (3.a) If an individual randomly selects two marbles without replacement, what is the probability that both marbles are red? (3.b) If an individual randomly selects two marbles with replacement, what is the probability that both marbles are red? 4. Solve...
I have this case study to solve. i want to ask which type of case study...
I have this case study to solve. i want to ask which
type of case study in this like problem, evaluation or decision? if
its decision then what are the criterias and all?
Stardust Petroleum Sendirian Berhad: how to inculcate the pro-active safety culture? Farzana Quoquab, Nomahaza Mahadi, Taram Satiraksa Wan Abdullah and Jihad Mohammad Coming together is a beginning; keeping together is progress; working together is success. - Henry Ford The beginning Stardust was established in 2013 as a...
Rusty Steuben, owner of Minnehaha Marine & Camp, is worried about his business’ future. He has...
Rusty Steuben, owner of Minnehaha Marine & Camp, is worried about his business’ future. He has tried various strate- gies for two years now, and he’s still barely breaking even. Two years ago, Rusty bought the inventory, supplies, equip- ment, and business of Minnehaha Marine & Camp, located on the edge of Minneapolis, Minnesota. The business is in an older building along a major highway leading out of town, sev- eral miles from any body of water. The previous owner...
INTRODUCTION Rebecca shook her head and gave a loud sigh as she hung up the phone...
INTRODUCTI0NRebecca shook her head and gave a loud sigh as she hung up the phone from talking with her dad."What is it?" her roommate Claire asked."Per usual, Daddy Jim wants me to use my 'schooling, as he likes to call it, to help him decide whether to buy a new crew cab truck with either a diesel or a gas engine," Rebecca replied."Well, maybe he will forget all about it if you just wait him out, "Aaire offered."Oh no, you...
I have this case study to solve. i want to ask which
type of case study in this like problem, evaluation or decision? if
its decision then what are the criterias and all?
Stardust Petroleum Sendirian Berhad: how to inculcate the pro-active safety culture? Farzana Quoquab, Nomahaza Mahadi, Taram Satiraksa Wan Abdullah and Jihad Mohammad Coming together is a beginning; keeping together is progress; working together is success. - Henry Ford The beginning Stardust was established in 2013 as a...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago