The data shown to the right for the dependent variable, y, and the independent variable, x, have been collected using simple random sampling. y 12 80 14 40 a. Construct a scatter plot for these data. Based on the scatter plot, how would you describe the relationship between the two variables? b. Compute the correlation coefficient. 10 70 14 50 13 60 10 90 15 30 11 100 a. Which graph below shows a scatter plot for these data? O A. O B. OD. Ay 120- Ay 120- 154 10+ 0+ 10 10 0- 10 120 15 120

The data shown to the right for the dependent variable, y, and the independent variable, x, have been collected using simple random sampling. y 12 80 14 40 a. Construct a scatter plot for these data. Based on the scatter plot, how would you describe the relationship between the two variables? b. Compute the correlation coefficient. 10 70 14 50 13 60 10 90 15 30 11 100 a. Which graph below shows a scatter plot for these data? O A. O B. OD. Ay 120- Ay 120- 154 10+ 0+ 10 10 0- 10 120 15 120

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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6f
Given the following data, do the tasks stated below. a) Identify the independent variable and the dependent variable. b) Construct a scatter plot. c) Determine the direction of the straight line that the data points seem to follow. d) Determine the strength of the correlation between the two variables.
Use the data from the given table of values to determine the correlation. In the answer space provided, give the r-value rounded to the hundredth. X Y 2 77 5 92 1 70 0 63 4 90 2 75 3 84
2. Graph the following points, and draw in the line of best fit. Comment on the fit of this line, and state if the correlation is positive or negative. 3 Y 1 2 2 3 4 4 8 5 9 6 13 W 7 17
5. For the following scores,X Y7 69 66 312 59 65 4 a. Sketch a scatter plot showing the six data points.b. Just looking at the scatter plot, estimate the value ofthe Pearson correlation.c. Compute the Pearson correlation.
use the sample data to construct a scatterplot. Use the first variable for the x-axis. Based on the scatterplot, what do you conclude about a linear correlation? FORECAST AND ACTUAL TEMPERATURES The table lists actual high temperatures and the high temperatures that were previously forecasted for these same days. The table includes data for ten different days near the author’s home. What does the result suggest about the accuracy of five-day predicted high temperatures?
The asking prices (in Rands) and the actual selling prices (in Rands), after bargaining, of 8commodities are given below.Commodity A B C D E F G HAsking price, x 150 350 400 750 100 650 600 250Selling price, y 120 200 400 550 80 450 350 200Find the correlation coefficient for the above data.A. 0.8224B. 0.3722C. 0.9438D. 0.5318
For the data in the table, find the following values. Round each answer to 4 decimals. y 1 10 17 22 10 24 12 31 14 34 17 39 a. The linear correlation coefficient is: b. The coefficient of determination is: 1237 890 NZ
Use a computer or statistical calculator to calculate the correlation coefficient in parts a through c below. Cost Miles a. The table shows the approximate distance between selected cities and the approximate cost of flights between those cities. Calculate the correlation coefficient between cost and miles. 190 958 413 3095 r= (Round to three decimal places as needed.) 256 1998 90 429 436 3008 b. This table shows the same information, except that the distance was converted to kilometers by multiplying the numbers of miles by 1.609 and rounding to the nearest kilometer. What happens to the correlation coefficient when numbers are multiplied by a positive constant? Cost Kilometers O 190 1541 413 4980 (Round to three decimal places as needed.) 256 3215 90 690 436 4840 A. The correlation is The correlation coefficient remains the same when the numbers are multiplied by a positive constant. B. The correlation is The correlation coefficient increases when the numbers are multiplied by a…
B. Listed below are amounts of bills for dinner and the amounts of the tips that were left. Construct a scatterplot, find the value of the linear correlation coefficient r, and find the P-value of r. Determine whether there is sufficient evidence to support a claim of linear correlation between the two variables. Use a significance level of a = 0.01. If everyone were to tip with the same percentage, what should be the value of r? 30.87 50.30 92.17 94.28 63.84 105.63 Bill (dollars) Tip (dollars) 5.90 7.08 14.83 18.07 7.93 20.08 Construct a scatterplot. Choose the correct graph below. OA. O B. C. O D. 25- 25- 25- 25- 120 120 30 Bill Amount ($) 120 30 120 30 30 Bill Amount ($) Bill Amount ($) Bill Amount ($) The linear correlation coefficient is r = (Round to three decimal places as needed.) Determine the null and alternative hypotheses. Ho:p(1)– H1:p(2) – (Type integers or decimals. Do not round.) The test statistic is t = (Round to two decimal places as needed.) The P-value is (Round to…
please solve A, B, and D ch 12
The data shown to the right for the dependent variable, y, and the independent variable, x, have been collected using simple random sampling. X. y 12 140 a. Construct a scatter plot for these data. Based on the scatter plot, how would you describe the relationship between the two variables? b. Compute the correlation coefficient. 15 170 11 130 13 160 15 180 10 120 14 140 10 150 a. Which graph below shows a scatter plot for these data? O A. OB. C. O D. Ay 200-4 Ay 200- 本y 15- Ay 15- 0+ 10 0+ 10 10+ 15 10 15 200 200 Click to select your answer(s).