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Suppose that 20% of all copies of a particular textbook fail a certain binding strength test....
The waiting time in years for a certain type of fan-belt to fail is known to...
The waiting time in years for a certain type of fan-belt to fail is known to have a distribution function, f(x)= 1/3 e-x/3, with an average waiting time of 3 years. Let the random variable X denote the waiting time to failure of a randomly selected fan-belt. Find the value of ksuch that P(X≤k)=0.6. If we have been waiting at least 5 years, what is the probability the total waiting time will be at least 6 years?
Will rate!! Suppose 81% of all students taking a beginning programning course fail to get their...
Will rate!!
Suppose 81% of all students taking a beginning programning course fail to get their first program to run on first submission. Consider a group of S such students,where each student's success is independent from the other and the chance each student fails on their first try is consistent. (Round answers to three decimal places.) (a) If X is the number of students whose program fails on the first run, then X comes from a binomial distribution with: n-...
Suppose 82% o all students aking a beginning p oaramming course fail to get her first program to ...
Please solve and explain
steps
suppose 82% o all students aking a beginning p oaramming course fail to get her first program to run on firs subr his on. Con from the other and the chance each student fails on their first try is consistent. (Round answers to three decimal places.) er a group of such student nere e c students succes independent (a) If X is the number of students whose program fails on the first run, then X...
Suppose that 10% of all steel shafts produced by a certain process are nonconforming but can...
Suppose that 10% of all steel shafts produced by a certain
process are nonconforming but can be re- worked (rather than having
to be scrapped). Consider a random sample of 200 shafts, and let X
denote the number among these that are nonconforming and can be
reworked. What is the (approximate) probability that X is a) At
most 30? [2] b) Between 15 and 25 (both inclusive)? [2] c) Assume
that the probability of at most x shafts being nonconforming...
68. Eighteen individuals are scheduled to take a driving test at a particular DMV dice on...
68. Eighteen individuals are scheduled to take a driving test at a particular DMV dice on a certain day, eight of whom will be taking the test for the first time. Suppose that six of these individuals are randomly assigned to a particular examiner, and let X be the number among the six who are taking the test for the first time. a. What kind of a distribution does X have (name and values of all parameters)? 2), and P(X>...
Suppose that new copies cost $150 and used copies cost $90.
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 15 purchasers.(a) What are the mean value and standard deviation of the number who want a new copy of the book?(b) What is the probability that the number who want new copies is more than two standard deviations away from the mean value?(c) The bookstore has 10...
A mixture of pulverized fuel ash and Portland cement to be used for grouting should have a compressive strength of more than 1300 KN/m2. The mixture will not be used unless experimental evidence indi...
A mixture of pulverized fuel ash and Portland cement to be used for grouting should have a compressive strength of more than 1300 KN/m2. The mixture will not be used unless experimental evidence indicates conclusively that the strength specification has been met. Suppose compressive strength for specimens of this mixture is normally distributed with σ-60. Let μ denote the true average compressive strength (a) What are the appropriate null and alternative hypotheses? Ho: μ < 1300 Hai μ-1300 Hu: μ-1300...
5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail...
5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection. In a random sample of 15 selected cars: (round 3 decimal places) a) Find the probability that at most five of the cars fail the inspection. b) Find the probability that at least three of the cars fail the inspection. c) Find the probability that all 15 of the cars fail the inspection. 6. Twenty-five percent of the customers of a grocery...
An individual who has automobile insurance from a certain company is randomly selected. Let Y be...
An individual who has automobile insurance from a certain company is randomly selected. Let Y be the number of moving violations for which the individual was cited during the last 3 years. The pmf of Y is given. y 0 1 2 3 p(y) 0.50 0.35 0.15 0.05 (a) What is the probability that among 15 randomly chosen such individuals, at least 10 have no citations? (Round your answer to three decimal places.) (b) What is the probability that among...
A certain flight arrives on time 80 percent of the time. Suppose 174 flights are randomly...
A certain flight arrives on time 80 percent of the time. Suppose 174 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 148 flights are on time. (b) at least 148 flights are on time. (c) fewer than 133 flights are on time. (d) between 133 and 150, inclusive are on time.
Will rate!!
Suppose 81% of all students taking a beginning programning course fail to get their first program to run on first submission. Consider a group of S such students,where each student's success is independent from the other and the chance each student fails on their first try is consistent. (Round answers to three decimal places.) (a) If X is the number of students whose program fails on the first run, then X comes from a binomial distribution with: n-...
Please solve and explain
steps
suppose 82% o all students aking a beginning p oaramming course fail to get her first program to run on firs subr his on. Con from the other and the chance each student fails on their first try is consistent. (Round answers to three decimal places.) er a group of such student nere e c students succes independent (a) If X is the number of students whose program fails on the first run, then X...
Suppose that 10% of all steel shafts produced by a certain
process are nonconforming but can be re- worked (rather than having
to be scrapped). Consider a random sample of 200 shafts, and let X
denote the number among these that are nonconforming and can be
reworked. What is the (approximate) probability that X is a) At
most 30? [2] b) Between 15 and 25 (both inclusive)? [2] c) Assume
that the probability of at most x shafts being nonconforming...
68. Eighteen individuals are scheduled to take a driving test at a particular DMV dice on a certain day, eight of whom will be taking the test for the first time. Suppose that six of these individuals are randomly assigned to a particular examiner, and let X be the number among the six who are taking the test for the first time. a. What kind of a distribution does X have (name and values of all parameters)? 2), and P(X>...
Suppose that 30% of all students who have to buy a text for a particular course want a new copy (the successes!), whereas the other 70% want a used copy. Consider randomly selecting 15 purchasers.(a) What are the mean value and standard deviation of the number who want a new copy of the book?(b) What is the probability that the number who want new copies is more than two standard deviations away from the mean value?(c) The bookstore has 10...
A mixture of pulverized fuel ash and Portland cement to be used for grouting should have a compressive strength of more than 1300 KN/m2. The mixture will not be used unless experimental evidence indicates conclusively that the strength specification has been met. Suppose compressive strength for specimens of this mixture is normally distributed with σ-60. Let μ denote the true average compressive strength (a) What are the appropriate null and alternative hypotheses? Ho: μ < 1300 Hai μ-1300 Hu: μ-1300...
5. Thirty percent of all automobiles undergoing an emissions inspection at a certain inspection station fail the inspection. In a random sample of 15 selected cars: (round 3 decimal places) a) Find the probability that at most five of the cars fail the inspection. b) Find the probability that at least three of the cars fail the inspection. c) Find the probability that all 15 of the cars fail the inspection. 6. Twenty-five percent of the customers of a grocery...
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