Elementary Statistics Using the TI-83/84 Plus Calculator, Books a la Carte Edition (4th Edition)
4th Edition
ISBN: 9780321953902
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 7.2, Problem 28BSC
Critical Thinking. In Exercises 17-28, use the data and confidence level to construct a confidence
Medication Usage In a survey of 3005 adults aged 57 through 85 years, it was found that 81.7% of them used at least one prescription medication (based on data from "Use of Prescription and Over-the-Counter Medications and Dietary Supplements Among Older Adults in the United States,” by Qato et al.. Journal of the American Medical Association. Vol. 300, No. 24).
- a. How many of the 3005 subjects used at least one prescription medication?
- b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through 85 years who use at least one prescription medication.
- c. What do the results tell us about the proportion of college students who use at least one prescription medication?
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A psychology researcher conducted a Chi-Square Test of Independence to examine whether there is a relationship between college students’ year in school (Freshman, Sophomore, Junior, Senior) and their preferred coping strategy for academic stress (Problem-Focused, Emotion-Focused, Avoidance). The test yielded the following result:
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Interpret the results of this analysis. In your response, clearly explain:
Whether the result is statistically significant and why.
What this means about the relationship between year in school and coping strategy.
What the researcher should conclude based on these findings.
A school counselor is conducting a research study to examine whether there is a relationship between the number of times teenagers report vaping per week and their academic performance, measured by GPA. The counselor collects data from a sample of high school students. Write the null and alternative hypotheses for this study. Clearly state your hypotheses in terms of the correlation between vaping frequency and academic performance.
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Elementary Statistics Using the TI-83/84 Plus Calculator, Books a la Carte Edition (4th Edition)
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