Hello, dear friend, you can consult us at any time if you have any questions, add WeChat: THEend8_
Review Test Submission: Quiz 1 MET CS 544 O1 Foundations of Analytics (2021 Fall 1) Assessments / Quizzes Review Test Submission: Quiz 1 User Lingyi Zhu Course MET CS 544 O1 Foundations of Analytics (2021 Fall 1) Test Quiz 1 Started 9/13/21 11:54 PM Submitted 9/14/21 1:01 AM Due Date 9/14/21 6:00 AM Status Completed Attempt Score 100 out of 100 points Time Elapsed 1 hour, 7 minutes out of 1 hour and 30 minutes Results Displayed All Answers, Submitted Answers, Correct Answers, Feedback, Incorrectly Answered Questions Question 1 Selected Answer: Answers: For the following data, what is the mean? 44, 80, 94, 164, 188 114 119 116 114 112 Question 2 Selected Answer: Answers: For the following data, what is the first quartile? Use the method described in the lecture. 8600, 7790, 3720, 6530, 6960, 5690, 5780, 8510, 1790, 3570 3720 5 out of 5 points 5 out of 5 points 5780 3720 5690 3570 Question 3 Selected Answer: Answers: For the following sample, how many Z-score values will be negative? 10, 20, 22, 24, 48 4 5 4 3 2 Question 4 Selected Answer: Answers: For the following sample, what is the variance? 16, 30, 34, 4, 22 141.2 151.2 139.2 133.2 141.2 Question 5 For the following data, what is the third quartile? Use the method described in the 5 out of 5 points 5 out of 5 points 5 out of 5 points Selected Answer: Answers: lecture. 7020, 4590, 5200, 7490, 3250, 1120, 1590, 2300, 2250, 7470 7020 7020 7470 5200 2250 Question 6 Selected Answer: Answers: For the following vector, the expression x[-1] will be equal to? x <- c(725, 1, 729, 151, 247, 648, 520, 297, 250, 679) None of the given choices 250 297 679 None of the given choices Question 7 Selected Answer: 70 Correct Answer: 70 Answer range +/- 0 (70 - 70 ) For the following vector, the expression x[6] will be equal to? x <- c(69, 46, 40, 83, 23, 70, 13, 50, 49, 74) Question 8 Selected Answer: For the following sample, what is the z-score value of 30 2, 22, 26, 30, 40 0.43 5 out of 5 points 5 out of 5 points 5 out of 5 points Answers: 1.23 0.63 0.93 0.43 Question 9 Selected Answer: Answers: For the following matrix m, 738 159 671 693 604 766 682 728 628 812 726 158 the median of m[,3] will be equal to? 682 NA 728 682 766 Question 10 Selected Answer: 542 Correct Answer: 542 Answer range +/- 0 (542 - 542 ) For the following dataframe df with columns Qr1, Qr2, Qr3 and row names A, B, C, D, E, _ Qr1 Qr2 Qr3 A 343 845 398 B 261 230 542 C 852 598 454 D 496 175 963 E 441 146 919 the median value of df[,3] will be equal to? Question 11 5 out of 5 points 5 out of 5 points 5 out of 5 points Selected Answer: Answers: For the following matrix m, 723 168 271 683 346 775 780 491 489 163 422 480 the expression m[2,3] will be equal to? 780 491 775 780 NA Question 12 Selected Answer: Answers: For the following data, what is the IQR? Use the method described in the lecture. 2190, 5650, 4430, 3280, 8510, 7910, 1940, 1260, 4330, 7070 4880 4330 3280 4880 4430 Question 13 Selected Answer: 166 Correct Answer: 166 Answer range +/- 0 (166 - 166 ) For the following vector, the expression sum(x[5:7]) will be equal to? x <- c(86, 74, 49, 28, 35, 72, 59, 79, 13, 1) Question 14 5 out of 5 points 5 out of 5 points 5 out of 5 points Selected Answer: Answers: For the following data, how many outliers are there? Use the IQR method described in the lecture. 245, 705, 8150, 870, 820, 810, 8330, 8790, 8660, 835 0 0 3 2 1 Question 15 Selected Answer: Answers: For the following matrix m, 233 794 545 980 675 862 541 845 644 790 679 828 which expression will change all values of third row to 679? m[3,] <- 679 m[3,] <- 679 None of the given choices m[,3] <- 679 m[3,3] <- 679 Question 16 Selected Answer: 650 For the following dataframe df with columns Qr1, Qr2, Qr3 and row names A, B, C, D, E, _ Qr1 Qr2 Qr3 A 409 250 743 B 914 317 301 C 364 161 620 D 712 231 233 E 333 888 590 the expression df[5,1] + df[2,2] will be equal to? 5 out of 5 points 5 out of 5 points Correct Answer: 650 Answer range +/- 0 (650 - 650 ) Question 17 Selected Answer: Answers: For the following data, what is the range? 6890, 7270, 2320, 5640, 5650, 3660, 6710, 8220, 3540, 3320 5900 5640 3660 5900 5650 Question 18 Selected Answer: Answers: For the following data, what is the relationship between the mean and the median? 3740, 3830, 160, 3150, 2270 mean is less than median mean and median are equal cannot be determined mean is less than median mean is greater than median Question 19 Selected Answer: For the following matrix m, 4620 8360 1480 4720 1880 2900 8820 6840 3240 5040 8140 2260 the mean of m[1,] will be equal to? 4795 5 out of 5 points 5 out of 5 points 5 out of 5 points Sunday, September 26, 2021 11:59:24 PM EDT Answers: 4795 1480 4620 4895 Question 20 Selected Answer: Answers: For the following data, what is the median? 4550, 9510, 3090, 4730, 2020, 7710, 6290, 6340, 1320, 9870 5510 4730 4550 5510 6290 ← OK 5 out of 5 points