17. A national random sample of 20 ACT scores from 2019 is listed below. What is the sample mean and standard deviation? 29, 26, 13, 23, 23, 25, 17, 22, 17, 19,12,26, 30,30,18, 14,12, 26,17,18 a. 20.50; 5.79 b. 20.50; 5.94 c. 20.85; 5.79 d. 20.85; 5.94 e. none of the above 18. Provided that the ACT scores are normally distributed with a mean of 18 and standard deviation of 6, determine the proportion of students with a score of 33 or higher. a. 0.0062 b. 0.0109 0. 0.0124 d. 0.0217 19. Using the data in question 17, indicate a number of observations that are two or more sample standard deviations away from the sample mean. a.0 b.1 0.2 d.3 e. none of the above 20. The data in question 17 is presented in which \"scale"? a. ratio b. categorical c. interval d. none of the above 21. When the correlation eoeicient, (r), is close to +1, this means that: a. there is no relationship between the two variables b. as one variable increases so does the other at the same rate 0. it is impossible to tell if there is a relationship between the two variables d. there is a strong, negative relationship between the variables 6. none of the above are true 22. Given the following data pairs (x, y), the magnitude of r is (1, 4), (2, 5), (3, 7), (4, 7), (5, 9), (6, 14), (7, 14), (8, 15), (9, 18), (10, 20) a. r: 0.49 b. r: 0.93 c. r= 0.97 d. r : 0.24