A recent study of 15 shoppers showed that the correlation between the time spent in the store and the dollars spent was 0.235. Using a significance level equal to 0.05, which of the following is the test statistic for testing whether the true population correlation is equal to zero?
A) t = 0.245
B) t = 1.76
C) t = 2.1604
D) t = 0.872

Question

Quizplus · Accepted Answer

The test statistic for testing the significance of a correlation coefficient is calculated using the formula: t = r√((n-2)/(1-r²)), where r is the sample correlation and n is the sample size. Substituting the given values (r = 0.235, n = 15) into the formula gives t ≈ 0.872.

A Recent Study of 15 Shoppers Showed That the Correlation