Illustration 15.36. From the given data find (i) the two regressionequations, (ii) coefficient of correlation.Marks inEconomics:25 28 35 32 31 36 29 38 34 32Statistics:43 46 49 41 36 32 31 30 33 39

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Answered: 7 Illustration 15.36. From the given…

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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1. The chart of data represents the heart rate (beats per mimute) of a jogger over time (minutes). Time (Min) 1 3 4 6. 7. 8. BPM 81 84 86 91 97 102 108 112 la. Write the cquation of the Line of Best Fit Your answer 1b. What is the correlation coefficient? Your answer
Please show all the equations with calculations in details please.
Example 5. Find the coefficient of correlation between the heights of brothers and sisters from the following data: Heights of brothers (in cm) : (x) 65 66 67 68 69 70 71 Heights of sisters 67 68 66 69 72 72 69 (in cm) : (y)
Calculate the coefficient of correlation between price and the supply of a commodity for the data given below. 11 12 13 14 15 16 17 18 19 20 21 22 Price Supply (kgs) 25 24 24 24 21 18 15 20 21 30 29 29
Illustration 15.17. A group of eight students get the following percentage of marks in test in Statics and Accountancy. Roll numbers of Students % of marks in % marks in Statistics Accountancy 11 50 80 12 60 71 13 65 60 14 70 75 15 75 90 16 40 82 17 70 70 18 80 50 Compute the rank correlation coefficient.
Consider the following table of data. 2 3 4 y 1 1 1 1.1 (a) Calculate the correlation coefficient. (b) Sketch a graph of the data. (c) Based on how closely the data fits a straight line, is your answer to part (a) surprising? Discuss the extent to which the correlation coefficient describes how well the data fit a horizontal line.
1. for each of the variables paige has recorded describe what type of data she has for each 2.what type of plot has paige produced? Comment on the initial impressions you gather from this plot. 3.calculate the correlation coefficient between the height of the strawberry plant and the amount of water it gets per day. Interpret the result.
1. A dietetics student wanted to look at the relationship between calcium intake and knowledge about calcium in sports science students. Table 1 shows the data she collected. Knowledge Respond ent Calcium intake Respond ent Knowledge Calcium intake score score (Out of 50) number (mg/day) number (Out of 50) (mg/day) 1 10 450 11 38 940 2 42 1050 12 25 733 3 38 900 13 48 985 4 15 525 14 28 763 5 22 710 15 22 583 6 32 854 16 45 850 7 40 800 17 18 798 8 14 493 18 24 754 9 26 730 19 30 805 10 32 894 20 43 1085 Is there a relationship between calcium intake and knowledge about calcium in sports science students?
2. A study was conducted to determine the relationship between a person’s monthly income in Omani Rials and the number of meals that person eats away from home per month. The data are shown below.
13.
After gathering data about the number of starfish and measuring the pollution in areas of the ocean you find a negative linear correlation between pollution levels and number of starfish. What can you conclude based on this information? a. There is a confounding variable that is affecting both pollution and starfish. b. As pollution rises the number of starfish falls c. That pollution is causing starfish to die, leading to the negative correlation d. That pollution is supporting starfish, leading to the negative correlation
5If the linear correlation coefficient between the weights (in kg) and heights (in inches) of 6 randomly selected males is 0.95, then 95% of the variation in weights of males can be explained by the linear correlation between height and weight? 1. True 2. False

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7 Illustration 15.36. From the given data find (1) hè twó regress equations, (ii) coefficient of correlation. Marks in 32 31 36 29 38 34 32 28 35 41 Economics: 25 Statistics: 43 46 49 36 32 31 30 33 39