QUESTION 4 5 points Save Answer A simple random sample of size n = 18 is obtained from a normally distributed population and the sample standard deviation is found to be 5 = 2.4. To test Ho: 0 = 1.8 versus H1: 0 > 1.8, you should use . (circle one answer) (a) Student's t-test (b) Z-test (c) F-test (d) xZ-test 0 Answer (d) 0 Answer (a) 0 Answer (b) 0 Answer (0) To construct a condence interval for matched-pairs data, you determine lower and upper bound by using formula. (circle one answer) (a) Lower bound: a za - %, Upper bound: 5 + za - 3; 5d n (b) Lower bound: 5 2.1/2 - 3; Upper bound: 3 + 21/; v" (c) Lower bound: (1 ta - 5\" Upper bound: J + ta - 5\" V5? 45 (d) Lower bound: 5 ta/z - 3; Upper bound: 3 + ta/z - 3; 0 Answer (b) 0 Answer (0) 0 Answer (d) 0 Answer (a) l IEC'I'IAII A