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Suppose probability samples of size n=2 are selected from {1, 2, 3, 4} with probabilities d1=.4, d2=.4, d3=.1, and d4=.1. Demonstrate that tau_hat is still an unbiased estimator of the population total, but its variance is 81.25.
What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?
the average cost per square foot for the office rental space in the central business district of petaling jaya is
Suppose that the probability that the student knows the answer to the question is 0.80 and the probability that the student guesses is 0.20. What is the probability that the fixed question is answered correctly?
The correlation between his test and the BDI was r =.14. Evaluate this correlation. What does this correlation tell us about the relationship between these two instruments?
A store has determined that 25% of all sales are credit sales. A random sample of 75 sales is selected. What is the probability that the sample proportion will be:
Explain why comparing children whose parents chose a Montessori school with children of other parents would not show whether Montessori schools perform better than other programs?
According to a report produced by the New South Wales Ministry of Health, 46% of hospitalisations occur in people aged sixty years and over (60+).
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
Doctors nationally believe that 68% of a certain type of operation are successful. In a particular hospital 47 of these operations were observed and 37 of them were successful. At a = 0.05 is this hospital's success rate different from the nationa..
Critically discuss why you would or would not expect each of the following variables to be normally distributed.
According to a recent study, 38% of all women will suffer a hip fracture because of osteoporosis by the age of 85. If six women aged 85 are randomly selected, what is the probability that a) None of them will suffer (or has suffered) a hip fractur..
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