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- (THIS QUESTION IS POSTED TWICE DUE TO THE AMOUNT OF SECTIONS, PLEASE ANSWER A-C AND THEN D-F. THANK YOU) An instructor asked a random sample of eight students to record their study times at the beginning of a course. She then made a table for total hours studied (x) over 2 weeks and test score (y) at the end of the 2 weeks. The table is given below. Complete parts (a) through (f). x 9 13 10 18 6 18 14 23 y 94 82 80 76 85 82 88 77 y = _____ + (___________)x (round to two decimal places as needed) b. Graph the regression equation and the data points. c. Describe the apparent relationship between the two variables. A. Test Score does not appear to change as Hours Studied increases. B. Test Score tends to increase as Hours Studied increases. C. Test Score tends to decrease as Hours Studied increases. D. There is no apparent relationship between Test Score and Hours Studied. a. Find the regression equation for…曲 Plot the following six points: (- 2, 2) (1, 5) (- 5, - 1) (1,0) (4, - 4) (0, – 3) 4 2. 2. -1 -1 -4 -3 -2 -3 -4 3. inHelp
- 2:16 mylab.pearson.com/ + K For the accompanying data set, (a) draw a scatter diagram of the data, (b) by hand, compute the correlation coefficient, and (c) determine whether there is a linear relation between x and y. Click here to view the data set. Click here to view the critical values table. (a) Draw a scatter diagram of the data. Choose the correct graph below. A. 0- C. O D. Ay Ay Q 20- 20- 20+ 20- ÎNALS TALLE TALE DALE 10 10 10 10 0 ||| B. Critical Values for Correlation Coefficient = 0 Critical values for the correlation coefficient Print n 3 0.997 4 0.950 5 0.878 6 0.811 7 0.754 8 0.707 9 0.666 10 0.632 11 0.602 12 0.576 13 0.553 14 0.532 15 0.514 16 0.497 17 0.482 18 0.468 19 0.456 20 0.444 21 0.433 22 0.423 23 0.413 24 0.404 25 0.396 26 0.388 27 0.381 28 0.374 29 0.367 30 0.361 n Done 0- O 0 Vol) 1 LTE 4G 45% - X 0- 3 0 :The table below shows the amount of shrimp and the amount of beef bought by each of 7 people. Create a scatter plot for the data. Amount of shrimp (in pounds) 5 8 9 10 11 13 14 Amount of beef (in pounds) Amount of beef (in pounds) 11 1 4 10 2 9 8 12+ 10+ 8- 6- y 10 12 Amount of shrimp (in pounds) FO X - SFoot temperatures: Foot ulcers are a common problem for people with diabetes. Higher skin temperatures on the foot indicate an increased risk of ulcers. In a study performed at the Colorado School of Mines, skin temperatures on both feet were measured, in degrees Fahrenheit, for 8 diabetic patients. The results are presented in the following table. Left Foot Right Foot 89 86 89 87 78 78 80 81 87 82 86 85 76 80 88 89 Send data to Excel
- For each variable in the table, determine an appropriate viewing rectangle, and produce the scatterplot. x(year) 1981 1982 1983 1984 1985 1986 y(sales) 3274 3394 3573 3070 2611 3132 Choose an appropriate viewing rectangle. O A. [1980,2000,1] by [2600,3600,100] O B. [1980,2000,1] by [3000,3600,100] OC. [3000,3600,100] by [1980,2000,1] O D. [2600,3600,100] by [1980,2000,1] Choose the correct scatterplot using the appropriate viewing rectangle found previously. O A. OB. OC.A study was done to look at the relationship between number of vacation days employees take each year and the number of sick days they take each year. The results of the survey are shown below. Vacation Days 2 7 0 3 2 9 15 3 8 0 11 Sick Days 10 3 6 5 4 5 0 4 2 11 0 Interpret the y-intercept in the context of the question: If an employee takes no vacation days, then that employee will take 8 sick days. The y-intercept has no practical meaning for this study. The best prediction for an employee who doesn't take any vacation days is that the employee will take 8 sick days. The average number of sick days is predicted to be 8F 5 6 7 8 + 9 10 11 12 13 14 15 16 data + 17 a Based on the boxplot above, identify the 5 number summary
- A retailer wants to see if a red "Sale" sign brings in less revenue than the same "Sale" sign in blue. The data below shows the revenue in thousands of dollars that was achieved for various days when the retailer decided to put the red "Sale" sign up and days when the retailer decided to put the blue "Sale" sign up. Red: 2.6, 3.2, 3.4, 1, 2.6, 4.6, 2.7, 3.3, 3.2, 2.4 Blue: 3.7, 4.6, 4.2, 4.1, 3.6, 2.1, 4.7, 3.6 Assume that both populations follow a normal distribution. What can be concluded at the α = 0.05 level of significance level of significance? For this study, we should use? The null and alternative hypotheses would be: H0: (please enter a decimal) H1: (Please enter a decimal) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is ? α Based on this, we should ? the null hypothesis. Thus, the final conclusion…The graphs show the various temperatures for the month of January in 2 cities. Which city has a higher variability of their January temperature?the box plot represents the average temperature in seattle for each day in august. what is the interquartile range of the data