STAT 2450 Study Guide - Final Guide: Standard Deviation, Exponential Distribution, Probability Distribution
4 Oct 2018
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Note: this review is longer than an exam would be, but the questions are representative of the types of questions you could see. There are no guarantees that the exam looks like the review. **multiple choice** please circle the best answer: based on responses of 1467 subjects in a general social survey, a 95% confidence interval for the mean number of close friends is (6. 8, 8. 0). We would like to update this information by calculating a 98% confidence interval. How large a sample is necessary in order for the bound on the error of estimation to be 0. 04: 233, 258, 542, 664, a sample of recorded dog barks is analyzed for decibel intensity. If this data set is normally distributed, we would expect approximately 95% of the barks to be within what range: (58. 03, 66. 47, (55. 92, 68. 58, (53. 35, 71. 15, (48. 90, 75. 60) ***for questions 7-11, you cannot get full credit unless you show your work.
