A researcher wants to assess the relationship between the number of training sessions dogs have before a dog show, and whether or not they win a prize at the dog show. Which correlation should the researcher use to measure the relationship? Point-biserial correlation Spearman’s rho Cramer’s phi Pearson’s correlation

A researcher wants to assess the relationship between the number of training sessions dogs have before a dog show, and whether or not they win a prize at the dog show. Which correlation should the researcher use to measure the relationship? Point-biserial correlation Spearman’s rho Cramer’s phi Pearson’s correlation

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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What is the interpretation of correlation coefficient?
A Yoga nstructor wants to inter it obesity is related to weight. The instructor selected 15 ot her students at random intervals and the observation is as shown below, a. Apply any suitable correlation analysis to check if there is any correlation between obesity and weight. Justify your choice. b. Calculate the correlation coefficient and interpret your result. Observation Age Severity of obesity VL Legends 2. Age YY: Very Young Y Young M Middle-aged O. Old 00 Very Old M VH 4. 00 VH 00 6. VL Obesity V Low LNormal HHigh VH: Very High 10 11 12 VH 13 14 15 VL VH
interpret this results by testing each correlation hypothesis.
A psychiatrist and psychologist are working together to evaluate the effectiveness of psychotherapy and/or drug therapy for anxiety patients. They have their patients A-H try psychotherapy for month the 1st month, Xanax for the 2nd month, and a combination of psychotherapy/Xanax for the 3rd month. Each month the patients are asked about their anxiety levels to determine which treatment was the most effective. Which of the following tests is appropriate for this study? Correlation Repeated Measures t-test (within subjects) Repeated Measures ANOVA Independent Measures t-test (between subjects)
What does a coefficient of correlation of 0.70 infer?
For a random sample of households in the US, we record annual household income, whether the location is east or west of the Mississippi River, and number of children. We are interested in determining whether or not there is a linear relationship between household income and number of children. Part 1 (a) State the null and alternative hypotheses. Ho: II vs Ha: 44₁ :: p ₂ ^ P₁ p II :: P₁ A P₂ : 0 p
Baseball owners believe that the more runs scored, the higher the attendance. Is there evidence that more fans attend games if the teams score more runs? Data collected midway through the season indicate a correlation of 0.848 between runs scored and the number of people at games. a) Does the scatterplot indicate that it's appropriate to calculate a correlation? Explain. O A. Yes, because the relationship between number of runs scored and attendance appears to be straight. O B. Yes, because the association between the number of runs scored and attendance is positive. 37500- OC. No, because there are too many outliers for a numerical correlation to be appropriate. 30000- O D. No, because the number of runs scored and attendance are not quantitative variables. b) Describe the association between attendance and runs scored. 22500- 320 360 400 440 480 O A. The association between attendance and runs scored is negative, straight, and moderate. Runs O B. The association between attendance…
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The degrees of freedom of correlation test is determined by what?
Which of the following best describes the Pearson correlation for these data?
Don't hand writing
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