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A hypohesis that people should follow a 24 hr. cycle of sleeping and waking even when they are not exposed to the usual pattern of sunlight. A study of eight volunteers were placed in a room by themselves which there was no light from outside and no clocks or indications of time. They could turn the lights on & off as they wished. After a month in the room each person developed a study cycle. they are: 25,27,25,23,24,25,26,25. Using the 0.05 significance level what should we conclude about the theory that 24hrs. is a natural cycle? a) use hypothesis steps b) sketch distribution c) explain to someone who never took this course.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter.
We would like to test if the proportion of respondents that support the health care bill is less than 50% (a) what kind of hypothesis test is appropriate?
Show how to generate a random variable from the exponential distribution function shown above. Show derivation of the equation.
Find the probability that the number who consider themselves baseball is (a) exactly 8, (b) at least 8, &(c)less than 8.
What signified to you on all of the problems that required a binomial distribution that you were to use a binomial distribution? Which problems required a binomial distribution?
We are intersted in the number of students who prefer brand C cola. identify the distribution of the random variable and the mean,standard deviation.
If random sample of 9 loads is selected for weight check, determine probability that mean weight of those loads is more than 40.60 tons.
Profitability at a bank is declining as customers are shifting to other banks. As a researcher, identify the problem (root cause of the symptom) through a scientifically crafted research proposal.
What is the half-width (from the middle of the confidence interval to either of the confidence limits) of the 99% confidence interval for the population mean time spent on investment research by portfolio managers?
You have been asked to develop a study of the effects of watching Sesame Street on childrens' gender role orientations, intelligence, or sociability.
How long they stay on each visit. How would you suggest taking this sample? What type of sampling have you described?
How many business students must be randomly selected to estimate the mean monthly earnings of business students at one college?
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