Question

using intervals to find cognition an d search Cognition = 102.3 -3.34 Years uses years playing football to predict the score on a cognition test. The following two intervals concern a person who has played football for 8 years Intervall: (22.7, 128,5) Interval II: (63.4.87.8) Incorrect. (a) Find the predicted cognition score for a person who has played football for 8 years. Round your answer to one decimal place. Cognition= 1 e Textbook and Media e Textbook Incorrect. prediction interval for the (b) Two intervals are given in this question: one is a 95% confidence interval for the mean response and the other is a93 response. Which is which? 95% CI for mean:

Answer 1

Let Y cognition X years The given regression equation is, Y = 102.3-3.34(x) The predicted cognition score for a person who has played football for 8 years is Y = 102.3 3.34(X) = 102.3 3.34(8) =75.58 75.6 b) The 95% confidence interval for the mean response is (63.4, 87.8) The 95% prediction interval for the response is (22.7, 128.5)