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A researcher collected data from male and female Caucasian, African American, and Hispanic graduate students using quantitative measures of extraversion, academic self-efficacy, dissertation anxiety, and math anxiety, each on a scale of 0 to 100 with higher scores indicating more of the specific latent attribute (e.g., more anxiety). Each participant was also asked if they intended to conduct a qualitative or quantitative dissertation study and how many months they estimated it would take to complete the dissertation.
Which of the following is a variable?
A. Male
B. Caucasian
C. Estimated months to complete dissertation
D. Graduate students
Specify the appropriate null and alternative hypotheses if we wish to test the research hypothesis that the mean GHQ score for all employed men exceeds 10.
Compare the probability in part a to the proportion of trucks in the sample that weighed more than 46,000 pounds. What does this imply to you?
What are the hypotheses we would want to test for the Kleenex case?
presents four sets of data prepared by the statistician Frank Anscombe to illustrate the dangers of calculating without first plotting the data.
consider a poisson probability distribution in a process with an average of 3 flaws every 100 feet. find the
In the Arnold's Muffler example for the exponential distribution, the average rate of service was given as 3 per hour, and the times were ex-pressed in hours.
a. What was your percentile score on this test? b. Using what you know about z scores and percentiles, how did you do on this test?
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample approximately half the size.
suppose that two evenly matched teams say team a and team b each with probability .5 of winning any given game make it
What can and should you do to minimize the cons? What are post hoc tests and when should they be used? Why are they important?
Population of following N=5 scores: 0,6,4,3, and 12. Calculate μ and σ for the population. Determine the z-score for each score in the population.
A student wants to plot a graph that will represent the frequency distribution of the data given. Which is the appropriate graph that can you advise her to use?
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