Hybrid Review Class Sept 8th No lecture
Please complete the list of tasks at home before Sept 9th.
1. Watch these sections of this Youtube video about Normal distribution
Statistics Lecture 6.2: Introduction to the Normal Distribution and Continuous Random Variables https://www.youtube.com/watch?v=shrTfDUB9Hk&list=PL5102DFDC6790F3D0&index=16
This lecture is a typical ECON 209 class. I encourage you to look at the entire lecture, but the minimum you should cover is: Start from 32:00 –> 1:29:00
2. Utilize the logic in the video, and answer these questions that are similar, but not identical, to the exercises in the video.
Answer the following questions ON YOUR OWN and turn in the answers before Sept 9th (end of day).
Turn the answers in by writing the answers on a piece of paper, take a picture, and upload it to this homework assignment through MOODLE. This homework will count toward your final grade.
1. Find the corresponding Z-scores using graphic illustrations and the Standard Normal Distribution Table:
a. The area under the standard normal distribution’s bell-shaped curve from negative infinity to the Z-score is 0.95. In another word, the probability of x being lower than the Z-score is 0.95. Find the Z-score
b. Similar question, replace area with 0.05
c. Similar question, replace area with 0.01
d. Similar question, replace area with 0.99
2. What is the mean of the sample mean X-bar? What is the variance of the sample mean X-bar? How to construct the Z-score of the sample mean X-b
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