Open market purchases raise the ________ thereby raising the ________.

A class of 30 introductory statistics students took a quiz worth 100 points. The standard deviation of the scores was 0.  What must be true about the students’ scores?

The present value of an expected future payment ________ as the interest rate increases.

Which of the following statements is a requirement for a function to be a probability density function?  Select all that apply.

If wealth increases, the demand for stocks ________ and that of long-term bonds ________, everything else held constant.

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The following table shows the joint distribution of X and Y. f(x, y) x y 2 4 1 0.12 0.08 3 0.30 0.20 5 0.18 0.12 (a) Find E(8X−4Y).  [blanka] (b) Compute P(Y ≤ 2 | X=4).  [blankc] For each part, enter your numeric answer as a decimal. Do not round.  

At a certain factory the thickness of a washer manufactured has mean = 12mm and variance = 0.5625mm. What is the largest probability that the washer thickness will be at the boundary or beyond the acceptance interval of 10.9 to 13.1? Hint: We are NOT ASSUMING NORMALITY and you will need to use a probabilistic inequality statement.  

Suppose that a researcher is interested in the average standardized test score for fifth graders in a local school district.  The group of fifth graders in the local school district is the [pop] and the average standardized test score across this group is the [parameter] of interest to the researcher. The fifth graders at a specific school would comprise a​ [sample] and their mean test score would be a​ [stat].

The purpose of the commitment by the Fed to keep the federal funds rate at zero for a long period of time is to