I need help on these problems for my statistic class. Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=219131529¢erwin=yes DAT 473 A Fall

I need help on these problems for my statistic class.

Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=219131529&centerwin=yes DAT 473 A Fall 2020 Eliyah Atkins & | 09/27/20 7:56 PM Test: Exam 2 Time Remaining: 01:28:42 Submit Test This Question: 1 pt 1 of 20 (0 complete) This Test: 20 pts possible Second-order polynomial models _ O A. measure interaction between variables O B. always curve downward O C. can curve upward or downward depending on the data O D. always curve upward Click to select your answer. ? Type here to search 7:56 PM " 9/27/2020Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=219131529&centerwin=yes DAT 473 A Fall 2020 Eliyah Atkins & | 09/27/20 7:57 PM Test: Exam 2 Time Remaining: 01:28:31 Submit Test This Question: 1 pt 2 of 20 (1 complete) This Test: 20 pts possible A study was recently performed by the Internal Revenue Service to determine how much tip income waiters and waitresses should make based on the size of the bill at each table. A random sample of bills and resulting tips were collected. These data are shown in the accompanying table. Based upon these data, what is the approximate predicted value for tips if the total bill is $100? Round to two decimal places Click the icon to view the data. O A. $12.88 Data Table - X O B. $20.61 O C. $26.03 O D. $15.55 Total Bill Tip $126 $19 $58 $11 $86 $20 $20 $3 $59 $14 $120 $30 $14 $2 $17 $4 $26 $2 $74 $16 Print Done Click to select your answer. ? Type here to search 7:57 PM " 9/27/2020Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=219131529&centerwin=yes DAT 473 A Fall 2020 Eliyah Atkins & | 09/27/20 7:57 PM Test: Exam 2 Time Remaining: 01:28:23 Submit Test This Question: 1 pt 3 of 20 (1 complete) This Test: 20 pts possible A recent study by a major financial investment company was interested in determining whether the annual percentage change in stock price for companies is linearly related to the annual percent change in profits for the company. The following data was determined for 7 randomly selected companies. % Change Stock Price % Change in Profit 8.4 4.2 95 5.6 13.6 112 - 32 4.5 12.2 18.4 - 2.1 13.4 Based upon this sample information, which of the following is the regression equation? O A. y = 4.19 +0.61x O B. y = 1.19 - 3.00x O C. y= 15.04 +4.25x O D. y = 20.19 + 0.005x Click to select your answer. ? Type here to search 7:57 PM " 9/27/2020Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=2191315298centerwin=yes DAT 473 A Fall 2020 Eliyah Atkins & | 09/27/20 7:57 PM Test: Exam 2 Time Remaining: 01:28:18 Submit Test This Question: 1 pt 4 of 20 (1 complete) This Test: 20 pts possible A random sample of two variables, x and y, produced the following observations: Compute the correlation coefficient for these sample data. Round to four decimal places O A. 0.5133 O B. - 0.9707 O C. - 0.2141 O D. 0.8612 Click to select your answer. ? Type here to search 7:57 PM " 9/27/2020Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=2191315298centerwin=yes DAT 473 A Fall 2020 Eliyah Atkins & | 09/27/20 7:57 PM Test: Exam 2 Time Remaining: 01:28:11 Submit Test This Question: 1 pt 4 5 of 20 (1 complete) This Test: 20 pts possible Which of the following is not considered to be a stepwise regression technique? O A. backward elimination O B. standard stepwise regression O C. optimal variable entry and removal regression O D. forward selection regression Click to select your answer. ? Type here to search 7:57 PM " 9/27/2020Take a Test - Eliyah Atkins - Google Chrome X mathxl.com/Student/PlayerTest.aspx?testld=219131529&centerwin=yes DAT 473 A Fall 2020 Eliyah Atkins & | 09/27/20 7:57 PM Test: Exam 2 Time Remaining: 01:28:02 Submit Test This Question: 1 pt 6 of 20 (1 complete) This Test: 20 pts possible A recent study of 15 shoppers showed that the correlation between the time spent in the store and the dollars spent was 0.235. Using a significance level equal to 0.05, which of the following is the appropriate null hypothesis to test whether the population correlation is zero? OA. Ho : H= 0.0 OB. Ho : r= 0.0 O C. Ho : P # 0 OD. Ho : P = 0.0 Click to select your answer. ? Type here to search 7:57 PM " 9/27/2020