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1. What is the central difficulty involved in obtaining simple random samples from large populations?
2. How does cluster sampling solve the practical problems involved in simple random sampling?
What linear transformation will change sixth grade scores x into new scores xnew= a+bx that have the desired mean and standard deviation?
Assuming the validity of this premise, among 25 randomly selected current customers, what is the probability that between 2 and 6 (inclusive) qualify for membership?
Alcohol appears to be involved in a variety of birth defects, including low birth weight and retarded growth. A researcher would like to investigate the effect of prenatal alcohol on birth weight.
Use the ustudy.sav file. This time, consider that you collected data only on ACADRNK, YRSPHD, SALARY, and PUBLCTN from the 20 faculty. The purpose of your analysis is to group this faculty into separate clusters based on the data you have.
for the chi-square test for goodness of fit what is the value of df for a test with four categories and a sample of
(i) Construct a stem and leaf plot of Fred's data. Comment on the shape of the plot. (ii) Calculate the mean and standard deviation of the data. What percentage of this data is within one standard deviation of the mean?
A repairable system consists of three non-identical components A, B,C , all of which must work for system success. When one component fails, no further component failures can occur. Construct the relevant state space diagram and hence evaluate gen..
If the names of these 100 people in the building are still unknown but a room is allowed to lodge one tenant at most , then are there how many ways of room occupation?
The listeners do not know which is playing, and the order has been determined randomly. Each person is asked to state which of the two performances he or she prefers. What statistical test is most appropriate here? Why?
suppose a geyser has a mean time between eruptions of 76 minutes. let the interval of time between the eruptions be
suppose referendum to increase funding for education is on the ballot in a large town population over 100000. an exit
a meteorologist who sampled 13 thunderstorms found that the average speed at which they traveled across a certain state
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