माध्यमिक डेटा (secondary data) का उपयोग करने से पहले, निम्नलिखित में से किसे सत्यापित करना आवश्यक नहीं है?

Arrange the correlation coefficients computed from the information given below in increasing order: A. ∑(xi - x)(yi - y) = 16∑(xi - x)2 = 64, ∑(yi - y)2 = 25 B. ∑(xi - x)(yi - y) = 20∑(xi - x)2 = 36, ∑(yi - y)2 = 49 C. ∑(xi - x)(yi - y) = 18∑(xi - x)2 = 25, ∑(yi - y)2 = 64 D. ∑(xi - x)(yi - y) = 24∑(xi - x)2 = 49, ∑(yi - y)2 = 64 Choose the correct answer from the options given below:

Match LIST-I with LIST-II: LIST-I (Purpose/Application) A. Testing the significance of regression coefficients B. Comparing more than two sample means C. Testing the goodness of fit D. Testing the significance of autocorrelation in a time series LIST-II (Statistical tests) I. Durbin-Watson test II. Chi-square test III. t-test IV. F-test Choose the correct answer from the options given below: