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Suppose that you have two statistics A and B as possible estimators of the same population parameter.
Estimator A is unbiased, but has a large variance. Estimator B has a small bias, but has only one-tenth the variance of estimator A. Which estimator is better? Explain.
What sample size is needed to estimate with 95% confidence the mean intake of calcium within 20 units of the true mean if the intake is from a normal distribution with a variance of 1900 units?
the verbal part of the graduate record exam has a mean ? of 500 and a standard deviation ? of 100. use the normal
A directed line segment in the plane can be represented as a pair of vectors -- the vector running from the origin to the start-point of the segment, and the vector running from the origin to the end-point of the segment. Use your vector represent..
Forecast sales for the next day using a three-day weighted moving average where the weights are 3, 1, and 1 (the highest weight is for the most recent number).
what are the values of the 1 test statistic 2-3 critical values and the 4 smallest level of significance at which the
a. Construct a bar chart that effectively displays these data. b. Construct a pie chart to display these data.
suppose x and y have joint density fxy e-xy for xy gt 0. find the distribution
In this module, you have explored the transitional phase of change. As a manager/leader you have many responsibilities to help the organization move through this phase. In this assignment, you will demonstrate your knowledge about a manager's role..
An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools.
Construct a histogram and a frequency polygon for the following data
an employee survey conducted two years ago packard motors inc. foundnbspthat 53 of its employees were concerned about
a polling company obtains an alphabetical list of names of voters in a precinct. they select every 20th person from
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