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7.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. (Could the research question be: The effect of after school tutorials on student test scores? If not, please use the original research question you chose) 1.What research question(s) does the study address? 2.What is Goldberg's rationale for the study? Was the study designed to contribute to theory? Do the results of the study contribute to theory? For both questions: If so, how? If not, why not? 3.What constructs does the study address? How are they operationalized? 4.What are the independent and dependent variables in the study? 5.Name the type of design the researchers used. 6.What internal and external validity threats did the researchers address in their design? How did they address them? Are there threats they did not address? If so how does the failure to address the threats affect the researchers' interpretations of their findings? Are Goldberg's conclusions convincing? Why or why not?
Suppose that two students named Gwyneth and Josephine have a total of 20 CDs in their room, consisting of 5 blues CDs and 15 reggae CDs. Each of the students chooses 7 CDs at random (without replacement), with all choices equally likely. (Thus, a..
Formulate an integer programming model, and solve it using EXCEL.
A graphical method, solve the simultaneous equations - A graphical method, solve the quadratic equation
1. Do this exercise by hand. A famous brand-name manufacturer wants to know whether people prefer Nibbles or Wribbles. They sample each type of cracker and indicate their like or dislike on a scale from 1 to 10. Which do they like the most?
Construct a 88% confidence interval for the mean femininity score of all male hotel managers and estimate the percent change amongst lactating mothers to within ± 0.5% with 99% confidence. How large a sample of nursing mothers do you need?
Draw out what this would look like as a histogram and describe the shape of the distribution - what would look like as a histogram
What was the total number of participants surveyed for the study and what was the total number of participants who completed the entire survey?
A simple random sample of 40 salaries of NCAA football coaches has a mean of $415,953 and a standard deviation of $463,364. Construct a 95% confidence interval estimate of the mean salary of an NCAA football coach.
an experiment is conducted in which 60 participants each fill out a personality test but not according to the way they
The production manager for the XYZ manufacturing company
Which of the following formulas would you use to find the probability that a sample mean is larger than some given value? z = (x - µ) ÷ σ µ = ∑x ÷ N
Has there been a statistically significant change in the mean length of the bars?
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