Sample Examination One - La Jolla High School

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Sarnple Exarnination <strong>One</strong> Section I 2. Which of the follorving statements about a linear regression model is true? I. T'he sum of the residuals is al*,ays zero. IL [f 12= 0. the regression line is a horizontal line. III. No pattem in the residual plot is an indication that a nonlinear model ivili show a better fit to the data than a straight-line resressicn model. (A) i only (B) I and Il onll' (C) I and III oniy (D) II and III onl5' (E) I, II, and III 3. Whichof the following is more likeli, to be true of this distribution? (A) Mean:3 (B) Mean = 3.5 (C) Mean:4 (D) Mean:3.5 (E) Mean:3 copyrng or reustng any part of lhis page is illegal Median Median Median Median Median 3 Mode 4 Mode 3.5 Mode 3.5 Mode 2 Mode -a _J _J *a _J :5 Answer tl Anslver
Section I Saxnple Exarnination <strong>One</strong> 4. For the past two-hundred years population per square feet in a northwest suburb can be modeled using the exponential equation: | = ab' The scatter plot of the data is shown below The R2 value of the exponential model is 0.98. c.) ! d 6) 70 60 50 40 Which of the following statements is true? 30 2A 10 0 1800 1900 2uuu (A) tf an attempt is made at fitting a straight iine model to the original data, the corresponding residual plot would be approximately linear' (B) If an attempt is made at fitting a straight line model to the original data, the corresponding residual plot would be scattered, and shorv no pattem. (C) lf an attempt is made at fitting a straight line model to the original data, the corresponding residual plot would be a straight line' (D) plotting the logarithm of the population per square mile against year should be approximatelY linear. (g) plotting the logarithm of the population per square mile against the logarithm of year should be approximately linear. Year Answer tt II copying or reuslng any parl of this page is illegal
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Sample Examination One - La Jolla High School

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