e«14:27. The management of a photograph record company has discovered that the number offects on records appears to follow a Poisson distribution with a mean equal to 0-4.G) What is the probability that a record selected at random will have three defects ?(ii) If management sets a policy that all photograph records sold to customers must not have anydefects, what per cent of its records production will not be made available for sales because ofdefects ?e-4 = 0.1832, e-04 0-6703.

Answered: Image /qna-images/answer/0157c783-0540-4a7b-a9c9-6ab966edc61e.jpg

Answered: e«14:27. The management of a photograph…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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suppose the length of the pregnancies of a certain animal is approximately normally distributed with mean = 100 days and standard deviation = 7 what is the probability that a randomly selected pregnancy less than 110 days?
2) In the year 2033, Kayla Faruq is leading emergency room doctor. Kayla is presently researching the relationship between stress and cardiovascular disease. Suppose systolic blood pressures of patients that are experiencing chronic stress is normally distributed with a mean of 140 and a standard deviation of 5.9. a) In a random sample of 16 chronically stressed patients, what is the probability the sample mean is less than 132? Would you classify this observation as an outlier? Why or why not? b) What is the probability a randomly selected chronically stressed patient has a systolic blood pressure less than 132? Would you classify this observation as an outlier? Why or why not? ||
A random sample of size 26 is to be selected from a population that has a mean ? = 48 and a standard deviation ? of 10. (d) What is the probability that this sample mean will be between 45 and 55? (Give your answer correct to four decimal places.)(e) What is the probability that the sample mean will have a value greater than 52? (Give your answer correct to four decimal places.)(f) What is the probability that the sample mean will be within 6 units of the mean? (Give your answer correct to four decimal places.)
9.If through a scatter diagram we can see a linear and negative association with a coefficient of determination (r ^ 2 = .89), then the correlation between the variables is: select one: a. -0.7921 b. 0.9434 c. -0.9434 d. 0.7921
Based on historical data, your manager believes that 20% of the company's orders come from first-time customers. A random sample of 93 orders will be used to estimate the proportion of first-time-customers. Show your answer to 4 decimal places if necessary.a. What is the distribution of ˆpp^? ˆpp^ ~ N(,)b. What is the probability that the sample proportion is more than 0.21? c. What is the probability that the sample proportion is between 0.17 and 0.21?
5. Suppose the time spent by a randomly selected student at a campus computer laboratory has a gamma distribution with mean 20 min and variance 80 min². (a) What are the values of a and B? (b) What is the probability that a student spends between 20 and 40 min at the laboratory? (c) Only 1% of students will spend more than how many minutes at the laboratory?
A new muscle relaxant is available. Researchers from the firm developing the relaxant have done studies that indicate that the time lapse between administration of the drug and beginning effects of the drug is normally distributed, with mean ? = 38 minutes and standard deviation ? = 5 minutes. (a) The drug is administered to one patient selected at random. What is the probability that the time it takes to go into effect is 35 minutes or less? (Use 3 decimal places.)(b) The drug is administered to a random sample of 10 patients. What is the probability that the average time before it is effective for all 10 patients is 35 minutes or less?(c) Comment on the differences of the results in parts (a) and (b).The probability in part (b) is ---Select--- smaller than larger than the same as part (a) because the ---Select--- mean standard deviation is ---Select--- smaller larger for the x distribution.
2. A specially designed car tire has an average life of 38,500 miles with a standard deviation of 2,500 ms is approximately normally distributed. (a) Let X = number of miles of a single tire. Find the probability that in the sample above the mean will be less than 38,000 miles. (Use 4 decimals) rox< 38000) =nomacr (IEa, 3,0o, 38,500, 2,50).5442 PCX bobnpt.ou vnio (b) Use the software tool below (or any other) to graph and shade the probability from part (a). Do not graph manually. The graph should show the appropriate area from part (a). Tool link: https://mathcracker.com/normal-probability-calculator-sampling-distributions (c) The tire manufacturer wants to set the tire warranty to 39,100 miles. Is this a good decision? What are the possible consequences to the manufacturer? Explain in detail.
please help me solve both parts a and b. please do not round your answers. if you solve correctly i will be glad to rate you. thank you so much for your help.
24. Suppose the waiting time for a goal to be scored in World Cup matches is an exponential random variable with mean 10 minutes. (a) What is the probability that more than 20 minutes passes before the first goal in a match is scored? Do not round your answer (so don't use a calculator). I (b) What is the probability that scoring the first goal in a match will be within one standard deviation from the mean waiting time? Do not round your answer (so don't use a calculator).
An "extraneous variable" is not a problem unless it with the independent variable O is identical systematically co-varies is not correlated Wait! An "extraneous variable" is by definition never a problem, that's what "extraneous" means.
7. Sunshine Blu-ray players have a funtional life that is nomally distributed with mean of 2.2 and a standard deviation of 0.3 year. What is the probability that a Blu-ray player years will break down during the first two years?

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