Question

for y=25 what is the estimated value of x,from the following data
x: 11 12 15 16 18 19 21
y:21 15 13 12 11 10 9
​

Answer 1

Answer:

7

Step-by-step explanation:

Answer 2

Answer:

x=11,12,15,16,18,19,21=112

y=21,15,13,12,11,10,9=91

xy=231,180,195,192,198,190,189=1375

x^2=121,144,225,256,324,361,441=1872

y^2=441,225,169,144,121,100,81=1281

x bar=112/7=16 and y bar =91/7=13

covariance (x,y)=1375/7-(16)(13)=-11.5715

sdy^2=1281/7-13^2=14

b^=-11.5715/14=-0.82653

a^=x bar -b^y. bar

=16+0.82653(13)

=26.74489

x=26.72289-0.82653(25)

x=6.08164