Construct the indicated predic
Construct the indicated prediction interval for an individualy.
The equation of the regression line for the paired data below is\hat{y}=6.1829+4.3394x and the standard error of estimate isse=1.6419.
Find the 99% prediction interval of y for x=14.
x: 9 7 2 3 4 22 17
y: 43 35 16 21 23 102 81
Answer:
SSE =Syy-(Sxy)2/Sxx= | 13.4794 |
s2 =SSE/(n-2)= | 2.6959 | |
stderrorσ = | =se=√s2= | 1.6419 |
x = | 14 | |||
predcitedvalue at X=14: | 66.93 | |||
std errorprediction interval= s*√(1+1/n+(x0-x̅)2/Sxx)= | 1.8068 | |||
for 99 % CIvalue of t= | 4.032 | |||
margin oferror E=t*stderror = | 7.285 | |||
lowerprediction bound=sample mean-margin of error = | 59.6490 | |||
Upperprediction bound=sample mean+margin of error= | 74.2192 |
99% prediction interval =(59.6490 ,74.2192)
(please take care of number of decimalsrequired)