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Suppose X is a vector of IID random variables where each element has some PDF,
Find an example PDF such that the median is a better estimate of the mean than the sample mean.
What would you predict the price per share to be if 95 million shares were offered?
an american association of individual investors aaii survey found that 23 of aaii members had purchased shares of stock
Calculate the regression line for father's score predicting daughters score - Draw a scattergram, and a freehand regression line.
In the text, a correlation matrix was described. Using your own words, ex- plain what is meant by a correlation matrix. What values appear along the diagonal of a correlation? How do we account for these values?
The lives of many people are affected by a fear that prevents them from flying. The Marist Institute for Public Opinion conducted a poll of 1014 adults
The production department wants to explore the relationship between the number of employees who assemble a subassembly and the number produced. The complete set of paired observations follows:
Suppose that a standard deviation is known to be 3. How large a sample size is needed to have an error of 2 on a 99% confidence interval? If n= 48 packages are randomly selected from packages received by parcel service. The sample has a mean weight o..
Calculate Dagwood's optimal consumption bundle showing all work. Then draw a completely labeled graph (the two period consumption model) depicting this initial optimal consumption bundle as point C* A (please use the space below).
The proportion of left handers is 0.10. What is the number of left handers in the sample and what notation is given to that number?
A normal population has an average of 80 and a standard deviation of 10. You select a sample of 25. Calculate the probability that the sample mean
high density lipoprotein hdl in healthy males follows a normal distribution with a mean of 50 and a standard deviation
A random sample of 46 observations was selected from a normally distributed population. The sample mean was xbar=81, and the sample variance was s2=35.0. Does the sample show sufficient reason to conclude that the population standard deviation is not..
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