A Complete Example
Answers
1.
, , , , .
, , .
, .
, .
.
.
, .
, .
The 95% confidence interval for is: .
At , the 95% confidence interval for is .
At , the 95% prediction interval for is .
3. The positively correlated trend seems less profound than that in each of the previous plots.
5. The regression line: . Coefficient of Correlation: . Coefficient of Determination: . . . A 95% confidence interval for . Test Statistic for . At , ; a 95% confidence interval for the mean value of is: ; and a 95% prediction interval for an individual value of is: .