Which of the following tables represent a function a. X -2 4 10 4 y 9 5 3 1 b. -2 4 -2 16 y 9 5 13 21 c. X 0 4 0 16 y 9 5 13 21 d. -2 4 10 16 y 9 5 3 1
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< 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Question 8 of 24 (4 points) Attempt 4 of Unlimited View question in a popup 9.2 Section Exercise 35 - 38 A test is made of H: 1 -18 versus H:>18. A sample of size - 45 is drawn, and x =20. The population standard deviation is 0-7. (a) Compute the value of the test statistic z. (b) is Ho rejected at the a=0.10 level? (c) Is He rejected at the a=0.01 level? Part: 0/3 Part 1 of 3 (a) Compute the value of the test statistic. Round the answer to at least two decimal places. < 4 5 6 ; 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Question 14 of 24 (6 points) Attempt 11 of Unlimited View question in a popup 9.2 Section Exercise 51 (critical value, tal Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.1 minutes. Assume the standard deviation is o -7.0 minutes. Suppose that a simple random sample of 103 visits was selected this year and has a sample mean of x = 22.1 minutes. A social scientist is interested to know whether the mean time of Facebook visits has changed. Use