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Consider a small population of N = 5 units, labeled 1, 2, 3, 4, 5, with respective y-values 3, 1, 0, 1, 5. Consider a simple random sampling design with a sample size n = 3. For your convenience, several parts of the following may be combined into a single table. (a) Give the values of the population parameters μ, τ , and σ2. List every possible sample of size n = 3. For each sample, what is the probability that it is the one selected? (b) For each sample, compute the sample mean y and the sample median m. Demonstrate that the sample mean is unbiased for the population mean and determine whether the sample median is unbiased for the population median.
A new procedure is being tested for the assembly of electronic circuit boards. For each of five employees, the time required to assemble a board is measured for both the current procedure and the method that has been proposed.
He measured whether their answers to a standard set of mental problems were affected. His approach to manipulating his independent variable involved
a biologist is studying the gestation period of domestic dogs. fifteen dogs are observed during pregnancy and are found
Fnd the probability that the face showing up a six turns up between 10 and 30 times. Find the probability that the sum of the face values of the 100 trials is less than 250.
during the last energy crisis a government official claimed that the average car owner refilled the tank when there was
How would we interpret a statistically significant difference in, say, a study comparing different treatments for depression? How would you contrast the interpretation of statistical significance with effect size?
Use a 0.01 significance level to test the claim that flights scheduled one day in advance cost more than flights scheduled 30 days in advance.
Calculate table T t . Calculate Computed T c .
A design for 2 treatments has p pairs of blocks. Each block has three plots. In each pair one block has two plots with A and one with B, and the other has two plots with B and a single plot with A.
what is the probability that an organization selected at random will have at least one of the three types of benefits?
The following data lists the number of hours spent working during the previous week. From these data round the relative frequencies to three decimal places.
In this exercise, you are playing the role of a researcher that is testing new medication designed to improve cholesterol levels. When examining cholesterol in clinical settings, we look at two numbers: low-density lipoprotein (LDL) and high-densi..
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