х3031117169341321276953Ex = 74; Ey = 584; Ex? = 1,404; Ey? = 70,840; Exy = 9,584%3D(a) Find x, y, b, and the equation of the least-squares line. (Round your answers for x and y to two decimal places. Round your least-squares estimates to three decimal places.)x = 12.33y = 97.33b = 4.847ý = 37.567 x+4.847(b) Draw a scatter diagram for the data. Plot the least-squares line on your scatter diagram.УУ2002001501501001005050101520 2535510152535200200150-150-10010050101520253035101520253035 (c) Find the sample correlation coefficient r and the coefficient of determination. (Round your answers to three decimal places.)What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.)(d) For a neighborhood with x = 21% change in population in the past few years, predict the change in the crime rate (per 1000 residents). (Round your answer to one decimal place.)crimes per 1000 residents

Answered: Image /qna-images/answer/2a7cae99-fd7f-43bd-a6be-c8d50e0b431f.jpg

Answered: х 30 3 11 17 169 34 132 127 69 53 Ex =…

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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Doctors are testing a new antidepressant. A group of patients, all with similar characteristics, take part in the study. Some of the patients receive the new drug, while others receive the traditional drug. During the study, a number of patients complain about insomnia. The data are shown in the contingency table below. What is the relative risk of insomnia for those who receive the new drug? Round to two decimal places. New drug Total Insomnia No insomnia Total Traditional drug 36 Provide your answer below: 52 88 226 295 521 278 331 609
r = -0.579 Calculate the coefficient of determination. (Round to three decimal places as needed.) What does this tell you about the explained variation of the data about the regression line? % of the variation can be explained by the regression line. (Round to one decimal place as needed.) About the unexplained variation? % of the variation is unexplained and is due to other factors or to sampling error. (Round to one decimal place as needed.)
Instructions: Use the technology of your choice (calculator, Excel, GeoGebra, Google Sheets) to find the regression line, the correlation coefficient of the following data sets, and interpolate or extrapolate the requested data. (Round all numbers to the nearest hundredth, when necessary.) Data Set: {(−3,4),(−2,3),(−1,3),(0,7),(1,5),(2,6),(3,1)}{(−3,4),(−2,3),(−1,3),(0,7),(1,5),(2,6),(3,1)} 1. The regression line is: y=_______ −________x 2. Based on the regression line, we would expect the value of response variable to be _______ when the explanatory variable is 0. 3. For each increase of 1 in of the explanatory variable, we can expect a(n) _________ of _________ in the response variable. 4. If x=−3.5x=−3.5, the yˆ=y^= Answer. This is an example of _______. 5. The correlation coefficient is r=r= Answer. (Round to the nearest hundredth.)
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Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y=85.73x+27.28 and the r=0.518.What proportion of the variation in y can be explained by the variation in the values of x?r² = __?__%
Home Prices A real estate agent compares the selling prices of homes in two municipalities in a certain location to see if there is a difference. The results of the study are shown. Is there enough evidence to reject the claim that the average cost of a home in both locations is the same? Use a = 0.10. City A City B X = $96,950 X,= $98,600 o, = $5602 0, = $4731 n, = 36 n2= 37 Part 1 of 5 motheses and identify the claim. separate them with (s):-1.65, 1.65 Part: 2 / 5 Part 3 of 5 (c) Compute the test value. Always round z score values to at least two decimal places.
IQ tests supposedly measure our intelligence. They typically are ‘normed’ so that they have a mean of 100 and a standard deviation of 15. (Higher scores show higher intelligence.) Use the graph and use the z-score and percents from columns b and c in Table A, when relevant. If you scored 132, what is your z-score? (Interpret.) Use table A X, z(a), (b), and (c) X z (a) (b) (c) and use the graph! Write down or save your response to use in Part 2 of this quiz. Group of answer choices -2.53 z. I'm at the 98.34 percentile rank and 1.66% of people scored smarter than me. 2.13 z. I'm at the 98.34 percentile rank and 1.66% of people scored smarter than me. -2.13 z. I'm at the 1.66 percentile rank and 98.34% of people scored smarter than me. 2.53 z. I'm at the 0.57 percentile rank and 99.43% of people scored smarter than me. 2.13 z. I'm at the 1.66 percentile rank and 98.34% of people scored smarter than me. 2.53 z. I'm at the 99.43 percentile rank…

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