Critical Thinking. In Exercises 17–28, use the data and confidence level to construct a confidence interval estimate of p, then address the given question. 20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous because it is addictive and can be lethal. In clinical trials, 227 subjects were treated with OxyContin and 52 of them developed nausea (based on data from Purdue Pharma L.P.). a. Construct a 95% confidence interval estimate of the percentage of OxyContin users who develop nausea. b. Compare the result from part (a) to this 95% confidence interval for 5 subjects who developed nausea among the 45 subjects given a placebo instead of OxyContin: 1.93% < p < 20.3%. What do you conclude?
Critical Thinking. In Exercises 17–28, use the data and confidence level to construct a confidence interval estimate of p, then address the given question. 20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous because it is addictive and can be lethal. In clinical trials, 227 subjects were treated with OxyContin and 52 of them developed nausea (based on data from Purdue Pharma L.P.). a. Construct a 95% confidence interval estimate of the percentage of OxyContin users who develop nausea. b. Compare the result from part (a) to this 95% confidence interval for 5 subjects who developed nausea among the 45 subjects given a placebo instead of OxyContin: 1.93% < p < 20.3%. What do you conclude?
Solution Summary: The author explains the 95% confidence interval estimate of the percentage of OxyContin users who develop nausea.
Critical Thinking. In Exercises 17–28, use the data and confidence level to construct a confidence interval estimate of p, then address the given question.
20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerous because it is addictive and can be lethal. In clinical trials, 227 subjects were treated with OxyContin and 52 of them developed nausea (based on data from Purdue Pharma L.P.).
a. Construct a 95% confidence interval estimate of the percentage of OxyContin users who develop nausea.
b. Compare the result from part (a) to this 95% confidence interval for 5 subjects who developed nausea among the 45 subjects given a placebo instead of OxyContin: 1.93% < p < 20.3%. What do you conclude?
Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
A biopsychologist studies the role of the brain chemical serotonin in aggression. One sample of rats serves as a control group and receives a placebo. A second sample of rats receives a drug that lowers brain levels of serotonin. Then the researcher tests the animals by recording the number of aggressive responses each of the rats display. (Hint: Be sure to use the correct test statistic).
Low Serotonin
Control
n = 4
n = 8
M = 22
M = 14
SS = 76
SS = 164
Does the drug have a significant effect on aggression? Use an alpha level of .05, two tails. Be sure to state your conclusion.
Use Cohen’s d to measure the effect size. What is the size of effect?
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A researcher examined the effects of mindfulness meditation on stress reduction. The researcher recruited
n=9 participants from a university campus and asked them to participate in a 30-minute mindfulness med-
itation session every day for two weeks. Before and after the two-week intervention period, the participants
completed the Perceived Stress Scale, a standardized self-report measure of stress levels.
The participants' stress scores are shown in this table.
participant before meditation after meditation
1
15
13
2
19
3
9
4
11
5
11
6
14
10
7
16
16
8
17
18
9
21
17
33752687
13
13
On average, by how much did the anxiety scores change from before versus after the two weeks of meditation
sessions? Use a related-samples t-test to determine if this change is statistically significant, and calculate the
coefficient of determination r².
Report your findings as a sentence or two that could be in the Results section of an APA-style research article.
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Hypothesis Testing using Confidence Interval Approach; Author: BUM2413 Applied Statistics UMP;https://www.youtube.com/watch?v=Hq1l3e9pLyY;License: Standard YouTube License, CC-BY
Hypothesis Testing - Difference of Two Means - Student's -Distribution & Normal Distribution; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=UcZwyzwWU7o;License: Standard Youtube License