1301201101015202530X130-1201101015202530What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.)%X(c) Find the sample correlation coefficient r and the coefficient of determination. (Round your answers to three decimal places.)r=2=(d) If a female baby weighs 17 pounds at 1 year, what do you predict she will weigh at 30 years of age? (Round your answer to two decimal places.)lb Modern medical practice tells us not to encourage babies to become too fat. Is there a positive correlation between the weight x of a 1-year old baby and the weight y of the mature adult (30 yearsold)? A random sample of medical files produced the following information for 14 females.1924212320x (lb)y (lb) 130 121 124 123 130 120USE SALTy =b=9=Σχ = 294; Σy = 1,778; Σx2 = 6,308; Σy2 = 226,896; Σxy = 37,517(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 answers for least-squares estimates to three decimal places.)x=160(b) Draw a scatter diagram for the data. Plot the least-squares line on your scatter diagram.y15014013015 2514512021 17 24 26 22 18 19130 130 130 130 140 110 115110y160150T140130120110

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Answered: 15 20 25 30 (c) Find the sample…

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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In the US, 46.2% of all people have type O blood, 39.1% have type A blood, 10.4% have type B blood and 4.3% have type AB blood. A researcher wants to see if the distribution of blood type is different for millionaires. The table below shows the results of a random sample of 3116 millionaires. What can be concluded at the a = 0.01 significance level? a. Complete the table by filling in the expected frequencies. Round to the nearest whole number: Frequencies of Blood Type Outcome Frequency Expected Frequency 1434 A 1224 В 310 AB 148 b. What is the correct statistical test to use? Select an answer V c. What are the null and alternative hypotheses? Но: O Blood type and income are independent. O The distribution of blood type for millionaires is not the same as it is for Americans in general. O The distribution of blood type for millionaires is the same as it is for Americans in general. O Blood type and income are dependent.
d the linear regression equation and the value of the linear correlation coefficient r. Round to 2 decimals. 19) The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands): Cost| 7 2 3 4 2 5 9 10 Number 85 52 55 68 67 80 83 73 to Cost r =
Given the Information, find the equation for the least squares line as well as the correlation coefficient. (Round your values to two decimal places.) n= 10, 57, r-1,E-13, - 353, 45 -0.665x +3.8905 r0 53 Need Help? Read it Additional Materials Tech Guide Excel Tech Guide TI-83/84 OTech Guide THNspire
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c) The store owner lets you know they are introducing a new bike. Using your model above what is your prediction for the price of the new bike if the bike weighs 17 pounds and is American Made.
linear regression. I already answered some question
50
Tall Buildings The stories and heights (in feet) of a sample of 10 buildings in Pittsburgh are shown. Stories.x 64 54 40 31 45 44 42 41 39 40 Height y 741 625 535 516 515 482 435 420 411 385 Send data to Excel The correlation coefficient for the data is r= 0.788 and a= 0.05. Should regression analysis be done? O The regression analysis should not be done. O The regression analysis should be done. Find the equation of the regression line. Round the coefficients to at least three decimal places. y'=a+bx a = b = Find y' when x = 36. Round your answer to at least three decimal places. y'

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