Question

1-) The following sample observations were randomly selected. (Do not round the intermediate values. Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.)

x	5	5	3	6	10
y	6	5	5	7	7

a-) Determine the 0.9 confidence interval for the mean predicted when x = 8.

[ __________ , ______________]

b-) Determine the 0.9 prediction interval for an individual predicted when x = 8.

[ __________, ________________]

Answer 1

Solution-

a) The 0.9 confidence Interval for mean predicted when x = 8

[ 5.593 , 7.721 ]

b) The 0.9 prediction interval for an individual predicted when x = 8

[ 4.703 , 8.610 ]