Based on a sample of n = 28, the least-squares method was used to develop the prediction line Ŷ, = 8 +3X;. In addition, Syx = 2.3, X= 7, and Σ (X₁-X)² = 28. Complete parts (a) through (c) below.i=1a. Construct a 90% confidence interval estimate of the population mean response for X = 5.≤Hy|x=5³(Round to two decimal places as needed.)b. Construct a 90% prediction interval of an individual response for X = 5.≤YX=5³(Round to two decimal places as needed.)c. Compare the results of (a) and (b) with those for X= 7, which are 28.26 HyX=7 ≤29.74 and 25.01 ≤Yx=732.99. Which intervals are wider? Why?▼the mean X.The intervals for X =C▼are wider because X = 7 is

Answered: Image /qna-images/answer/904b4c42-5f41-4b1a-a180-78c80fb37245.jpg

Answered: Based on a sample of n = 28, the…

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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A certain method was performed on a reference material. The method has a low RSD, but high relative error from the reference value. Which of the following are appropriate to solving the problem? a. Repeat the experiment with more trialsb. Re-assess the method to minimize random errorsc. Calibrate instruments used in the methodd. Compare the method with proven accurate methods
I need solutions for d) and e). Please.
In multiple regression analysis involving 10 independent variables and 100 observations, the critical value tt for testing individual coefficients in the model will have:A. 10 degrees of freedomB. 89 degrees of freedomC. 100 degrees of freedomD. 9 degrees of freedom In a multiple regression analysis involving 40 observations and 5 independent variables, the total variation SST=350 and SSE=50. The multiple coefficient of determination is:A. 0.8469B. 0.8529C. 0.8408D. 0.8571
11.10 Refer to Exercise 11.9. Create R output and answer the questions instead of using minitab output) a. Find the least-squares estimates of the slope and intercept in the output.b. What does the sign of the slope indicate about the relation between the speed ofthe drill and bit lifetime?c. Compute the residual standard deviation. What does this value indicate about thefitted regression line?
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16% of all college students volunteer their time. Is the percentage of college students who are volunteers smaller for students receiving financial aid? Of the 313 randomly selected students who receive financial aid, 31 of them volunteered their time. What can be concluded at the αα = 0.10 level of significance? For this study, we should use Select an answer z-test for a population proportion t-test for a population mean The null and alternative hypotheses would be: H0:H0: ? p μ Select an answer < ≠ = > (please enter a decimal) H1:H1: ? μ p Select an answer > ≠ = < (Please enter a decimal) The test statistic ? t z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is ? > ≤ αα Based on this, we should Select an answer reject accept fail to reject the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly lower…

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