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A researcher is interested in the relationship between attention deficit hyperactivity disorder (ADHD) and conduct disorder in middle school classes. Her hypothesis is that students with ADHD are more likely to experience conduct disorders at school. She obtained a random sample of seventh and eighth graders from a suburban middle school in Washington D.C. ADHD was measured using a self-administered test that ranked the student on the following order: no attention deficit; some attention deficit; high attention deficit, and conduct disorder was a dichotomous (i.e. two category) variable consisting of conduct disorder/no conduct disorder.
a) What is the unit of observation and population for this sample?
Unit of observation
Population
A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day
an investment adviser for g. prowe rice has many clients owning shares of mutual funds. these mutual funds are
Fit a model to the data that incorporates the number of hours spent working with the client and the type of client as independent variables.
The 5-step approach to hypothesis testing and an explanation of your decision to reject or fail to reject the null hypothesis.
Use column percentages, the maximum difference, and measures of association to describe the strength and direction of the association between the type.
To exercise your skills, you are to perform the following using different tools available to you (e.g. Excel spreadsheet, graphing calculator, etc.) and write and explanation on your findings:
Suppose 5.9% of certain population use public transportation to get to work. You randomly select 380 workers and ask them if they use public transportation to get to work.
a sample of n8 scores has a mean of m10 after one score is removed from the sample the mean for the remaining score is
For a sample data set, the linear correlation coefficient r has a positive value. Which of the following is true about the slope b of the regression line.
How Many M&Ms of each color were eaten?
A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both.
Consider the following linear programming problem: A workshop of Peter's Potters makes vases and pitchers. Profit on a vase is $3.00; profit on a pitcher is $4.00. Each vase requires ½ hour of labor, each pitcher requires 1 hour of labor.
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