Given the linear correlation coefficient r and the sample size n, determine the

Question

Given the linear correlation coefficient r and the sample size n, determine the critical value of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.
r = 0.486, n = 20

Select one:

a. Critical value: r = 0.444, significant linear correlation

b. Critical value: r = 0.561, significant linear correlation

c. Critical value: r = 0.561, no significant linear correlation

d. Critical value: r = 0.444, no significant linear correlation

Explanation / Answer

Using critical value table and searching for critical value for two tailed test and degree of freedom= 20-2= 18, critical value would be 0.444

Option A is correct

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