The mileage (in 1,000s of miles) that car owners get with a certain kind of radial tire is a random variable having an exponentialdistribution with a mean of 50.a. What is the probability that a tire will last at most 40,000 miles?b. What is the probability that a tire will last at least 65,000 miles?c. What is the probability that a tire will last between 70,000 and 80,000 miles?

The exponential distribution is often used to model the lifespan of an object or the time between…

Answered: The mileage (in 1,000s of miles) that…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Next Question Use the data in the following table, which lists drive-thru order accuracy at popular fast food chains. Assume that orders are randomly selected from those included in the table Drive-thru Restaurant D A. D 260 56 231 Order Accurate Order Not Accurate 335 37 141 40 17 If one order is selected, find the probability of getting an order from restaurant A or D or an order that is not accurate. The probability of getting an order from restaurant A or D or an order that is not accurate is (Round to three decimal places as needed.) Enter your answer in the answer box 15 AM 12/7/2020 LG
The probability histogram to the right represents the number of live births by a mother 47 to 51 years old who had a live birth in 2012. 0.30- 0.267 0.25- 0.233 0.20- -0.172 0.15- 0.112 0.094 0.10- 0.057 0.05- 0.028 0.037 0.00- 1 4 6 7 8 Child (a) What is the probability that a randomly selected 47- to 51-year-old mother who had a live birth in 2012 has had her fourth live birth? |(Type an integer or a decimal.) (b) What is the probability that a randomly selected 47- to 51-year-old mother who had a live birth in 2012 has had her fourth or fifth live birth? | (Type an integer or a decimal.) (c) What is the probability that a randomly selected 47- to 51-year-old mother who had a live birth in 2012 has had her sixth or more live birth? | (Type an integer or a decimal.) (d) If a 47- to 51-year-old mother who had a live birth in 2012 is randomly selected, how many live births would you expect the mother to have had? (Round to one decimal place as needed.) Probability 3-
Suppose the mean weight of carryion bags has a normal distribution with a mean of 7.4 pounds, with a standard deviation 2.2 pounds. Find the probability that the mean weight of a sample of 25 bookbags will exceed 7 pounds. a. .182 b. .629 c. .572 d. None of the other 4 answers e. .818
The reported cancer rates for men ages 65 and older is 23%. Assume this estimate is the true population proportion of men ages 65 and older who have been diagnosed with some form of cancer. A SRS of 25 men ages 65 and older is taken. Calculate the probability that proportion of men ages 65 and older who have been diagnosed with some form of cancer is more than 0.30. (The answer has to be either A or B) A. 0.2033 B. 0.2236
The weights of steers in a herd are distributed normally. The variance is 10,000 and the mean steer weight is 1100⁢lbs. Find the probability that the weight of a randomly selected steer is between 919 and 1180⁢lbs. Round your answer to four decimal places.
On average, TV crash after 17,000 hours of continuous use. Although the time for the TV to crash is random, researchers have found that the duration until the computer crashes follows an exponential probability distribution. a. What is the probability that the TV will fail with a usage time of less than 17,000 hours?b. What is the probability that the TV will crash with a usage time of more than 17,000 hours?c. What is the probability that no TV will fail after more than 17,000 hours of use?d. What do you think about the results of points b and c above! What is the difference?
A professor knows that her statistics students' final exam scores have a mean of 80 and a standard deviation of 12.2. In her class, an "A" is any exam score of 90 or higher. This quarter she has 25 students in her class. What is the probability that 7 students or more will score an "A" on the final exam?Hint: You will need to use your knowledge of normal probability distributions to determine the probability of one individual getting an A and then use your knowledge of binomial distributions to determine the probability of 7 students or more out of 25 students getting an A.prob = ____________Report your final answer accurate to 4 decimal places. Do not round any of the numbers in this calculation until the very end of the problem!
Answer D
Answer A-C
An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 115 cm and a standard deviation of 5.5 cm. A. Find the probability that one selected subcomponent is longer than 117 cm. Probability = B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 117 cm. Probability = C. Find the probability that if 4 are randomly selected, all 4 have lengths that exceed 117 cm. Probability =
40% of consumers believe that cash will be obsolete in the next 20 years. Assume that 6 consumers are randomly selected. Find the probability that fewer than 3 of the selected consumers believe that cash will be obsolete in the next 20 years. The probability is (Round to three decimal places as needed.) ...
r a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 510 and a standard deviation of 170 . The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 526 . What is the probability that a sample of 40 exams will have a mean score of 526 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.

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