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The June 2002 American Journal of Psychiatry reported that researchers used medication and psychotherapy to treat children aged 7 to 16 who exhibit bipolar symptoms. After 2 years, symptoms had cleared up in only 26 of the 89 children involved in the study.
a) Write a 95% confidence interval, and interpret it in this context.
b) If researchers subsequently hope to produce an estimate of treatment effectiveness for bipolar disorder that has a margin of error of only 6%, how many patients should they study?
A consumer products company surveys 30 shoppers at a mall and asks each one if he/she likes the packaging of a new soap product. The results of the survey are:
a basketball player has made 44.1 of the 3 pointers he has attempted. suppose he attempts 20 3-point goals for the
Predicting oil spill evaporation. - Write the equation of the model.- Identify the terms in the model that allow for curvilinear relationships.
What is the importance of pretesting questions in an insturment you are developing? How might you go about doing such a pretest?
a researcher would like to know whether there is a consistent predictable relationship between verbal skills and math
Players in a particular sports league are classified based on the amount of time they play as backups or starters.
The government of the United States of America is the federal government of the republic of fifty states that constitute the United States, as well as one capital district, and several other territories. Discuss the history of federal government?
A total of 183 residents show up for a public hearing on the proposal, and a show of hands finds only 31 in favor of the prison project. What can the city council conclude about public support for the mayor's initiative?
What is frequency distribution? What is a bar graph? What are percentile rankings? What is a histogram? What is a pie chart? When would a researcher use a bar graph, histogram, percentile rankings, or pie chart? Name examples that we see of the..
IQ tests generally have scores in which the mean is 100, and the standard deviation is 16. If your IQ score was 134, what percentage of the population would have a higher IQ than you?
In fitting a least squares line to n = 10 data points, the following quantities were computed:
Discuss where this common statistical analysis technique might be useful in your business. Is it being used already? If not, how will you help introduce others to it?
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