write down your last and first name as well as student\'s ID# on the title page
ID: 3074758 • Letter: W
Question
write down your last and first name as well as student's ID# on the title page of exam. Give complete answers solutions clearly. Submit r t the problems in a space provided and write all of your the results of testing. You may write anywhere on these exam pages. You may also the book and use the accompanying exam book for scrap paper. Put your name on hand it in with your test. Each problem holds a score. Total number of score points is 100. Good luck! 1. The height of six-year-old girls have a mean of 117.80 cm, and a standard deviation of 5.52 cm. Find Z score corresponding to a six-year-old girl who is 106.80 cm tall. Is that height unusual? (Consider a score to be unusual if its Z score is less than -2.00 or greater than 2.00). Show the result of Z-score calculations and circle one of the multiple choice answers (4 points). A)-1.83, No B) 2.15, Yes C)-1.99, No D) 1.99, Yes 2. A computer operator must select 3 jobs from 10 available jobs waiting to be completed. How many different combinations of 3 jobs are possible? Show the result of calculations and circle one of the multiple choice answers. (5 points) A) 120 B) 45 C)30 D) 720Explanation / Answer
mu= 117.8
sigma= 5.52
X= 106.8
Z=(X-mu)/sigma
=-1.9927
correct option is C ) -1.99, No
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2)
10C3=10!/3!*7!=120 ways
option A is correct
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