(MDM4U - Journal - Ch8: The Normal Distribution 1. Why is the z-score for 97.5% used to construct a 95% confidence interval? Support your answer with a sketched distribution. 2. Given that Zo.975 = 1.96, approximately how many standard deviations wide is a 95% confidence interval? MDM4U_Journal (Communication) Name: Topic: 3 2 1 4 Concept Connection Writing Writing Writing Writing demonstrates a demonstrates a demonstrates a demonstrates a good understanding limited deep and solid basic understanding of the concepts; may understanding of the understanding of the of the concepts; contain minor errors concepts; and/or concepts, beyond and/or may contain such as arithmetic or more than 1 crucial expectations. one crucial error. sign errors etc. error. Explanation and Example Explanations are Explanations are Explanations may detailed and sufficiently not always be thorough. sufficiently detailed; Several interesting, detailed. complex and Several relevant Some examples are examples are used provided; basic creative examples are used to explain to explain each of examples are used to explain the each of the the concepts. concepts. concepts. Organization of Information Journal is very clear, Journal is clear for Journal is difficult to interesting, and easy the most part. understand and to follow and Wording reads fairly unclear; and/or understand. Journal smoothly. sounds nearly the reads smoothly. Grammatical same as the notes Grammatical problems given in class. problems rarely sometimes affect Grammar problems affect clarity. clarity. often affect clarity. / 10