What are the hypotheses for testing to see if a correlation is statistically significant?Hor=0: H₁r0Ho: p=0: H₁p0Ho: p= ±1: H₁p #±1Ho: p = 0; H₁:p=1Ho: r = ±1; H₁: r#±1

Null hypothesis:The null hypothesis defined as whether there is no difference in the test or not and…

Answered: What are the hypotheses for testing 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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A correlation coefficient close to _____ indicates no relationship between the variables: 0.00 -1.00 1.00 0.50
..Which of the following values could not represent a correlation coefficient? r= 0.98r = 1.09r = -.075r = -1.0
The authors of a paper presented a correlation analysis to investigate the relationship between maximal lactate level x and muscular endurance y. The accompanying data was read from a plot in the paper. X 410 760 760 y 3.90 3.90 4.80 5.30 4.10 3.40 State the appropriate null and alternative hypotheses. | Ho: p = 0 Ha: p > 0 Ho: P = 0 Ha: p = 0 Ho: p = 0 r = Sxx = 2,619,573.214, Syy = 36.8881, Sxy = 7,323.132. A scatter plot shows a linear pattern. (a) Test to see whether there is a positive correlation between maximal lactate level and muscular endurance in the population from which this data was selected. (Use α = 0.05.) Ha: p < 0 Ho: P = 0 790 840 1,035 1,210 1,260 1,310 1,410 Ha: p = 0 6.40 6.98 t = P-value = 1,485 1,490 1,495 7.45 5.05 7.70 Compute the value of the sample correlation coefficient, r. (Round your answer to four decimal places.) 2,190 4.35 6.50 8.80 Calculate the test statistic and determine the P-value. (Round your test statistic to one decimal place and your P-value…
Place the steps of conducting a correlation hypothesis test in order.Match each step on the left with the procedure at that step on the right. Step 1 2 3 4 5 6 7 Todo A. find the critical value from the table B. conclude there is a linear correlation or not sufficient evidence to conclude there is a linear correlation C. compare the absolute value of the test statistic to the critical value D. write null and alternative hypotheses E. reject or fail to reject the null hypothesis F. select a significance level alpha G. find the value of r (correlation coefficient) from your calculator
What is the r2value if the obtained correlation is r= 0.70? a. 0.049 b. 0.49 c. 1.40 d. Cannot tell without additional information
Report the correlations between the three independent variables (age, educ and Protestant) and your dependent variable (childs). Which category had the correlation that was the weakest?
Test whether the correlation from question 1 is statistically significant (i.e., significantly different from 0). Report the df and p-value of the test. ID Alcohol (x) Tobacco (y) xy x^2 y^2 1 6.47 4.03 26.0741 41.8609 16.2409 2 6.13 3.76 23.0488 37.5769 14.1376 3 6.19 3.77 23.3363 38.3161 14.2129 4 4.89 3.34 16.3326 23.9121 11.1556 5 5.63 3.47 19.5361 31.6969 12.0409 6 4.52 2.92 13.1984 20.4304 8.5264 7 5.89 3.2 18.848 34.6921 10.24 8 4.79 2.71 12.9809 22.9441 7.3441 9 5.27 3.53 18.6031 27.7729 12.4609 10 6.08 4.51 27.4208 36.9664 20.3401 11 4.02 4.56 18.3312 16.1604 20.7936 Total 59.88 39.8 217.7103 332.3292 147.493
An r value of .8 indicates a strong positive correlation. True False
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
Ramona measures how positive a person’s mood is and how creative he or she is and predicts that there is a relationship. She obtained the following interval scores: Mood (X) Creativity (Y) 10 7 8 6 9 11 6 4 5 5 3 7 7 4 2 5 4 6 1 4 Compute the correlation coefficient. What are H0 and Ha? With α = 0.05, what is rcrit? What should she conclude about this relationship? Calculate the proportion of variance accounted for.
A researcher obtained the following results for a study: n = 44, SSy = 340603, SSx = 33712, B̂ = 2.0025 Find the correlation for these results?
In a sample of n=20 what would be the student's t test statistic for a correlation of r=0.400?

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What are the hypotheses for testing to see if a correlation is statistically significant? Hor=0: H₁r0 Ho: p = 0; H₁p0 Ho: p = ±1; H₁ :p #±1 Ho: p = 0; H₁ p = 1 Ho: r = ±1; H₁: r#±1