Answers to Quiz 8

Here are the answers to Quiz 8, which will be counted as a lab instead of a quiz and a new Quiz 8 will be given on Tuesday, with checksums.

Data set: 1990-2009 n = 20

R² =.5956

yp = .1830x - 361.3035

What is the value of yp when you plug in 1990? 2.8665

What is the value of yp when you plug in 2009? 6.3435

95% confidence threshold = .1971 Does R² surpass it? Yes

99% confidence threshold = .3147 Does R² surpass it? Yes

====================


Data set: 1990-2009 n =10

R² =.1601

yp = .1006x -196.0848

What is the value of yp when you plug in 2000? 5.1152

What is the value of yp when you plug in 2009? 6.0206

95% confidence threshold = .3994 Does R² surpass it? No

99% confidence threshold = .5852 Does R² surpass it? No