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Question: Speed of light. In 1882 Michelson measured the speed of light (usually denoted c as in Einstein s famous equation E = mc2). His values are in km/sec and have 299,000 subtracted from them. He reported the results of 23 trials with a mean of 756.22 and a standard deviation of 107.12.
a) Find a 95% confidence interval for the true speed of light from these statistics.
b) State in words what this interval means. Keep in mind that the speed of light is a physical constant that, as far as we know, has a value that is true throughout the universe.
c) What assumptions must you make in order to use your method?
A player has only one money unit and wishes to increase his fortune to five units. To do so, he plays independent repetitions of a game that, in case of a win, yields double the sum he betted.
In a randomly selected sample of 400 registered voters in a community, 220 individuals say that they plan to vote for Candidate Y in the upcoming election.
A particular type of electronic component for use in PCs is mass produced and subject to quality control checks since it is known that 2% of all components produced in this way are defective.
The owner of a local golf course wanted to determine the average age of the golfers that played on the course. In a random sample of 30 golfers that visited his course, the sample mean was 48.34 and the standard deviation was 9.327. Calculate a 90..
the makers of compute-all know that in the past 40 of their sales were from people under 30 years old 45 of their sales
1. What is the beta of a portfolio if E(RP ) = 16%, µf = 5.5%, and E(RM ) = 11%? 2. Suppose that the risk-free rate of interest is 0.03 and the expected rate of return on the market portfolio is 0.14. The standard deviation of the market port..
A wooden cube with painted faces is sawed up into 1000 little cubes, all of the same size. The little cubes are then mixed up, and one is chosen at random. What is the probability of its having just two painted faces?
you complete a hypothesis test using o= .05 and based on the evidence from the sample your decisions to fail to reject the null hypothesis. if the treatment actually does have an effect, which of the following is true?
Does the black grease beneath football players' eyes really reduce glare or just make them look intimidating? In a variation of a study actually conducted.
The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described with a Normal model.
If the campus was equally divided between males and females, what are the probabilities of males and females on this campus would be at risk?
Suppose that in a pharmacologic study involving 6000 patients,75 patients have blood-glucose levels at least 1.5 times the upper limit of normal on one occasion. What is the probability that this result could be due to chance?
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