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M109 Name____________________________________

Spring 2021

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1. Jackson needs to get a 70 in his M109 class. His class is based on four test scores. So far, he has scored a 60, 75, and 68 on the first 3 tests. What does he need to get on his fourth and final test in order to get a 70 in the class?

2. What is the average of the first 200 odd numbers?

3. The average on a Sociology exam is 73 and the scores are normally distributed. The standard deviation is 8.

a. What percentage of students scored above an 81?

b. What percentage of students scored below 57?

c. Out of the 120 students who took the exam, how many students scored between 49 and 89?

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