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Question: For problem, suppose that it costs twice as much money to sample a child as the younger and older adults, where costs are the same per sampled person. Use the information in problem 16-24 (the weights and standard deviations) to determine an optimal allocation of the total sample.
Problem: Cadbury, Inc., is interested in estimating people's responses to a new chocolate. The company believes that people in different age groups differ in their preferences for chocolate. The company believes that in the region of interest, 25% of the population are children, 55% are young adults, and 20% are older people. A proportional allocation of a total random sample of size 1,000 is undertaken, and people's responses on a scale of 0 to 100 are solicited. The results are as follows. For the children, = 90 and s = 5; for the young adults, x = 82 and s = 11; and for the older people, x = 88 and s = 6. Give a 95% confidence interval for the population average rating for the new chocolate.
Let X be a random variable of the continuous type that has pdf f(x). If m is the unique median of the distribution of X and b is a real constant, show that E(X - bl) = E(X - ml) + 2 [(b - x)f(x) £lx, provided that the expectations exist.
Given are five observations collected in a regretion study on two variables: What is the value of the standard error of the estimate?
These data were collected using a telephone interview with pet owners in Mishawaka, Indiana. The animal shelter was run by the Humane Society of Saint Joseph County. The control group data were obtained by a random digit dialing telephone survey. ..
telephone marketers and opinion polls use random digit dialing equipment to call residential telephone numbers at
Classify the events as dependent or independent - find the probability that he or she owns a credit card given that the student is a freshman. Round your answer to three decimal places.
Determine the highest number of miles (to nearest whole number) that motorist could drive in month and still qualify for discount?
Based on anthropological reports in which the status of women is scored on a 10-point scale, the mean and standard deviation across many cultures are known. A new culture is found in which there is an unusual family arrangement.
If a customer did not default on a loan, what is the probability that the rating system would have classified the applicant in the reject category?
address the issue of extrapolation and using regression equations to forecast far into the future. explain the dangers
Find the asymptotic distribution of the MLE of the indicated parameter and find formulas for approximate standard errors of the MLE.
jude is interested in buying a digital camera. he visited 9 stores at random and recorded the price of the particular
Assume rf is 5% and rm is 10%. According to the SML and CAPM, an asset with a beta of -2.0 has a required return of negative 5%[=5-2(10-5)]. Can this be possoble?
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