HW 8 soln - Stat 133 HW 8 (10 pts) Name_ Group # _ Please...

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Stat 133 HW 8 (10 pts) Name___________________ Group # _____ Please read and follow the information in the “Homework Policies” document posted in the Homework section of Carmen. Make HW an opportunity to learn and prepare for the final. Reminder: Copying or nearly copying HW can and already has resulted in a loss of a full letter grade in the class this quarter, as determined by the OSU Committee on Academic Misconduct. Hand drawn/written work is fine as long as it is legible. Please don’t add extra space in the document. NORMAL DISTRIBUTION 1. Do problem 1.86 on page 49 of your textbook. Please note that “standardized scores” are also known as Z-values, or “Z-scores”. Draw the appropriate pictures of the normal distributions, show all work and justify your answer in less than 10 words. so Z=(680-500)/100=1.8 200 300 400 500 600 700 800 0 6 12 18 24 30 36 So Z=(27-18)/6=1.5 So Eleanor’s standardized score is higher than Gerald’s, he did better in the exam.
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2. Do problem 1.106 on page 62 of your textbook. Use the “TELECOMSTOCKS” data posted on Carmen in the HW section. The point of the problem is to see if the 68-95-99.7 rule works for the DATA in this case. That helps you to decide whether the POPULATION has a normal distribution. You’ll do the calculations using the mean and standard deviation of the DATA (and s), instead of the mean and standard deviation of the POPULATION ( μ and σ ), which are not available. a.
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HW 8 soln - Stat 133 HW 8 (10 pts) Name_ Group # _ Please...

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