Consider the set of bivariate data shown in the table.XyCompute()².015 16.5220323.4423.2524.124.8

The bivariate data set is given.

Answered: Consider the set of bivariate data…

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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Example 2: A local community college professor was interested in interviewing students from her college to determine how much, on average, those students spend on textbooks each semester. She randomly sampled 47 students and found that they had spent an average of $214 on textbooks each semester with a standard deviation of $51. a) Construct and interpret an 87% confidence interval for the true mean amount of money that students at this particular community college spend on textbooks each semester. b) How would the interval that you created in part (a) compare to an 80% confidence interval for the same parameter? Calculate the new interval to justify your answer. c) How would the interval that you created in part (a) compare to a 96% confidence interval for the same parameter? Calculate the new interval to justify your answer.
What type of data are represented in the table? Univariate categorical Bivariate categorical Univariate numerical Bivariate numerical
The data below represent the number of days absent, x, and the final grade, y, for a sample of college students at a large university. Complete parts (a) through (e) below. No. of absences, x 4 5 6 7 8 0 1 2 3 9 Q 87.6 84.7 81.7 79.2 76.2 71.8 62.4 66.6 63.7 60.7 Final grade, y C (a) Find the least-squares regression line treating the number of absences, x, as the explanatory variable and the final grade, y, as the response variable. y=x+ (Round to three decimal places as needed.)
Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (x) Cost(y) 586 78.6 855 95.5 936 118.6 912 115.2 659 81.9 317 55.7 893 100.3 941 103.1 209 39.9 248 39.8 A student calculates a linear model y = x + Use the model to estimate the cost when number of pages is 208. Cost = $ (Please show your answer to 2 decimal places.) (Please show your answers to two decimal places)
re is a bivariate data set. x y 24.8 12.9 35.2 39.9 -1.9 -21 49.5 39.4 29 35.7 34.5 23.8 25.8 12.3 48.7 85.2 23 3.1 23.4 22.7 22.9 3.2 41.7 41.2 36.4 4.9 21.3 23.4 -0.7 5.5 34.8 79.7 Find the correlation coefficient and report it accurate to three decimal places.r = What proportion of the variation in y can be explained by the variation in the values of x? Report answer as a percentage accurate to one decimal place.r² = %
Q1.2
Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both tests and the results are shown below. Test A (x) 43 65 73 34 99 78 65 Test B (y) 39 60 62 20 85 70 54 1. Calculate r, the linear correlation coefficient. Identify the values for each part below. Part a. The value of n Part b. The sum of the x-values Part c. The sum of the y-values Part d. The sum of the x-squared values Part e. The sum of the y-squared values Part f. The sum of the (xy) values Part g. The final value of r rounded top three decimal places
Post secondary education information was examined for a random selection of states. The data below show the number of community colleges in the number of universities for each particular state. Community: 12, 17, 13, 10, 8 University: 4, 6, 5, 4, 3 A. Create a scatterplot of the given data sets B. Find the correlation coefficient of the sets of data. C. Create the equation of the regression line for the data and evaluate it when X=300.
Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (x) Cost(y) 724 122.6 379 61.85 782 112.3 250 48.5 390 61.5 574 100.1 325 60.75 894 131.1 396 74.4 450 76.5 827 133.05 A student calculates a linear model (Please show your answers to two decimal places) y = Use the model to estimate the cost when number of pages is 992. x + Cost = $ (Please show your answer to 2 decimal places.)

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Consider the set of bivariate data shown in the table. X y 2 0 5 1 16.5 2 20 3 23.4 4 23.2 5 24.1 6 24.8