Assume that we asked 20 subjects to participate in a smoking cessation study. We recorded their craving for a cigarettebefore and after applying a nicotine patch. One reason we might want to use a non-parametric test is because:a. The subjects are all maleb. We have too many subjects for a parametric testOc. There are some outliers that we don't want to have undue influence on the resultsd. The data are normally distributed

Parametric and non-parametric tests: Parametric tests require the sample to follow a particular…

Answered: Assume that we asked 20 subjects to…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Prof. Lopez wants to know whether type of the exam formats will impact on student’s final exam by ask a group of students taking the final exam with paper format and another group of students taking the same exam with computer format. a. Repeated measure t test b. One way ANOVA c. Independent- measures t test d. Correlation
A researcher conducts an independent-measures study to examine how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats, low serotonin group, 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. See the data below. Is there a significant difference between the control group and the low serotonin group regarding the number of aggressive responses? Control Low Serotonin n = 10 n = 15 M = 14 M = 19 SS = 180.5 SS = 130 Perform a hypothesis test using independent-measures t-test. Use a two-tailed…
Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What can you say is most likely true about GPAs in our class?
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Kami Uploads Roboto Justin Stewart-ET 2 PROB AND STATS WEEK 7 BOX PLOTS.pdf : 18px : 1.5pt B I USA A X₂ X² E Bowling Team Scores 20 40 60 80 100 120 140 160 180 200 220 240 260 Another bowling team had the following scores for its members. LOWEST FIRST SCORE 30 80 QUARTILE MEDIAN 120 RANGE 330 70 B) Which team has a bigger spread and why? A) Use the table above to sketch the boxplot for the second bowling team R O
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A researcher wanted to know if there was a correlation between the number of times a boxer incurred head injuries (traumatic encephalopathy) to depression scores reported by the same individuals. The data for 10 boxers (number of injuries and depression scores from 0-10 where 0 means no depression) is as follows: Number of brain injury Depression Score 0 1 9 10 4 7 7 8 2 1 1 0 8 10 5 5 0 2 4 6 a. Use the four steps of hypothesis testing and calculate a Pearson correlation for the above data, starting with the hypotheses.b. Find critical value at an alpha level at α=.05, two tailed.c. Include the coefficient of determination with a sentence explaining the outcome of both calculations in APA format.d. Create a scatter plot by hand of the above data set.
Give me an example of a research scenario where you would use an independent samples t-test. You can set up a situation where there is an experimental group and a control group, or maybe you want to compare two other groups of people (parents and non-parents, gender, partnered and single, etc). Give us a summary of what you would want to study, who your sample participants would be, why an independent samples t-test would be the best fit, and what statistically significant results would mean. Don't forget to include your research and null hypotheses!
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