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A researcher plans to conduct an experiment evaluating the effect of a treatment. A sample of n=9 participants is selected and each person receives the treatment before being tested on a standardized dexterity task. The treatment is expected to lower scores on the test by an average of 30 points. For the regular population, scores on the dexterity task form a normal distribution with u = 240 and s = 30.a. If the researcher uses a two-tailed test witha =.05, what is the power of the hypothesis test?b. Again assuming a two-tailed test with a =.05, what is the power of the hypothesis test if the sample size is increased to n=25?
when circuit boards used in the manufacture of compact disc players are tested the long-run percentage of defectives is
Using a single-server queuing system with Poisson arrivals of 10 units per hour and a constant service time of 2 minutes per unit. How do I go about calculating how long the customer waiting time will be in seconds, on average?
it is reasonable to model the number of winter storms in a season as with a poisson random variable. suppose that in a
Line up for a family photo, with the condition that the youngest child is in the centre, how many distinguishable arrangements are there?
Test the null hypothesis that the telephone survey technique has a probability of selecting a household with no children that is equal to the value obtained by the census.
Below is the data set for the amount of trash by ten households (in pounds per day). Assume the population is normally distributed
let y be a random variable with a density function given byfy 32y2 -1ltylt1fy 0 elsewherefind the density fuction
a below are the numbers of deaths from tornados in the u.s. from 1990 through 2000.53 39 39 33 69 30 25 67 130 94
That the requirement is NULL AND VOID. To be PROVED UNWORKABLE and sink like the Titanic? It is WORTH a little delay to have such a desirable result, isn"t it?
What is the probability that a red ball will be chosen? If we randomly select 5 balls with replacement, what is the probability distributon of x-the neumber of red balls in the sample?
What are the expected value and standard deviation of the number of small aircraft that arrive during a 90-min period?
Find a 99% confidence interval for the population mean number of weekly miles.
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