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?
3. The life expectancy of computer terminals is normally distributed with a mean of 5.2 years...
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...
7. The average life expectancy of dishwashers produced by a company is 8 years with a standard deviation of 6 months. Assume that the lives of dishwashers are normally distributed. a. What is the probability that a randomly selected dishwasher will have a life expectancy of at least 7 years? b. Dishwashers that fail operating in less than 4 1/2 years will be replaced free of charge. What percent of dishwashers are expected to be replaced free of charge? c....
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...
Assume that the height of men are normally distributed with a mean of 69.8 inches and a standard deviation deviation of 3.5 inches. If 100 men are randomly selected, find thr probability that they have a mean height greater than 69 inches. Asume that the heights of men are normally distributed with a mean of 69.8 inches and a standard deviation of 3.5 inches of 100 men wa randomly selected in the probability that they have a meaning greater than...
1.) A particular fruit's weights are normally distributed, with a mean of 601 grams and a standard deviation of 34 grams. If you pick 2 fruit at random, what is the probability that their mean weight will be between 599 grams and 668 grams 2.) A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 225.1-cm and a standard deviation of 1.4-cm. For shipment, 15 steel rods are bundled together. Find the...
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...
The life expectancy of a particular brand of light bulbs is normally distributed with a mean of 1500 hours and a standard deviation of 75 hours. What is the probability that a bulb will last between 1500 and 1650 hours?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.1 years, and standard deviation of 1.1 years. If you randomly purchase one item, what is the probability it will last longer than 3 years?
(5 points) The life of an electric transistor is normally distributed, with a mean of 500 hours and a standard deviation of 80 hours. Determine the probability the transistor wil last more than 400 hours. 3.
Replacement times for televisions are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years. Find the probability that a randomly selected television will need a replacement time less than 6 years.