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1) Why are quasi-experimental designs used more often than experimental designs?
2) One conclusion you might reach (hint) after completing the readings for this assignment is that there are no bad designs, only bad design choices (and implementations). State a research question for which a single-group post-test only design can yield relatively unambiguous findings.
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
For the mold described in (g), can you find the probability that it's COST value will exceed $150,000? If yes, obtain this probability. If no, why not?
In a normal distribution of 1,000 aptitude test scores, with a mean of 60 and a standard deviation of 8, how many scores fall:
Let x = number of the ball obtained on any selection. Then the probability distribution for x is given by:
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
Data analysis must be completed using a statistical software package - either Statistix for Windows, with the MegaStat add in, SPSS, SAS, R or any other legitimate software package.
If a complete failure occurs, calculate the probability that the fault occurred in:
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
If one invested in Stock A, Determine standard deviation of percentage return?
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
On randomly selected day, let X and Y, respectively, be proportions of time that the drive-in and walk-in facilities are in use. Determine the marginal density of X.
For the following cases, determine whether the sampling is dependent or independent. Explain your conclusion.
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