Question

Could someone check my work and make sure the units are right thank you

Suppose you wish to see if there is a relationship between the price (in $100) and rating (in points) of 7 laptop computers tested by Consumer Reports. You collected the information below. (See exercise 11 on page 614 of your textbook for a similar problem.) SS = SS= MSE = 42.2143 79.5714 18.5739 Question 1 Using the Ftable, find the p-value for the Global Fstat. 0.025 p-value 10.05 Question 2 Find the 99% CI for B1 (with appropriate units). Left Endpoint = -0.7896 dollars/point Right Endpoint = 4.5594 dollars/point- dollars/point points/dollar dollars points Click to Grade Your Work

Answer 1

Anova table
variation	SS	df	MS	F-stat	p-value
regression	149.9873	1	149.9873	8.08	0.0362
error,	92.8695	5	18.5739
total	242.8568	6

so, p value

0.025<p value <0.05

2)

std error ,Se =    √(SSE/(n-2)) =    4.3097

confidence interval for slope                  
α=   0.01              
t critical value=   t α/2 =    4.032   [excel function: =t.inv.2t(α/2,df) ]      
estimated std error of slope = Se/√Sxx =    4.3097 /√   42.2143 =   0.663
                  
margin of error ,E= t*std error =    4.032   *   0.663   =   2.675
estimated slope , ß^ =    1.8849              
                  
                  
lower confidence limit = estimated slope - margin of error =   1.8849   -   2.675   =   -0.7897
upper confidence limit=estimated slope + margin of error =   1.8849   +   2.675   =   4.5595

left end point = -78.97 dollars /points

right end point = 455.95 dollars/points