_{Solve the given problem.}

1. From the following data, compute the coefficient of correlation between x and y. a. Arithmetic mean of x series is 25 and that of y is 18. b. Sum of the products of deviations of x and y series from their respective means = 122. c. Sum of the squares of deviation from their respective means are 136, 138 respectively for x series and y series. d. Number of pairs of values is = 15. 2. Using the coefficient correlation formula find the number of items o with the data given below (n round-off to whole number). r = 0.50. n_xy - ExZy = 120, nEx - (Xx) =90, nEy -(Ey) = 64n 3. The reading comprehension test and the vocabulary test among 13 years old students are shown below. a. Determine the extent of their relationship of the results between the reading comprehension test and the vocabulary test and interpret the result. b. Determine the regression line equation. c. Draw the scattered diagram and the least square regression line. d. Determine the coefficient of determination and interpret the result. Reading 3 2 9 10 16 5 3 8 Comprehension Vocabulary Test 11 19 5 17 3 15 9 15 8 12 4