MATH 120 Community College of Southern Nevada Fundamentals of Mathematics Questions


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Math 120 Chapter 3 Quiz
——————————————————————————————————————————From the given the frequency table
Value Frequency
1. (1 point) Find the mode.
2. (1 point) Find the median.
3. (1 point) Find the mean.
——————————————————————————————————————————4. (1 point) You had an 88% average entering the final. The final makes up 20% of your class grade.
What percentage do you have to earn in the final in order to have an 90% overall percentage?
5. (1 point) Given the numbers 2, 5, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 19, 20, 22. Find the percentile
rank of the number 19.
6. (1 point) Jimmy’s percentile rank was the 84th in a class of 175 students. What was his class rank?
(Answer with a number: 1 = 1st, 2 = 2nd, 3 = 3rd, etc.)
7. (2 points) Given the numbers 2, 3, 4, 5, 7, 9, 10, 14, 15. Find the five-number summary.
Low = _______, Q1 = _______, Median = _______, Q3 = _______, High = _______.
——————————————————————————————————————————The given pie graph shows the percentage of each of the three registered voter groups in a county.
8. (1 point) It is known that there are 490 registered Republican voters. Find the total number of
registered voters.
9. (1 point) What is the number of Democrat voters?
——————————————————————————————————————————10. (2 points) Find the standard deviation for the following data. Round answer to the hundredth place.
10, 12, 14, 15, 16, 35. (Do not round anything before you reach the final answer.)
——————————————————————————————————————————The scores of a standardized test are normally distributed with a mean of 500 points and a standard
deviation of 50 points. Use the normal graph provided below (also in the Notes, bottom of page 13) to
answer the following questions. Do not use a graphing calculator’s normal distribution function.
11. (1 point) What percent of test takers scored below 450?
12. (1 point) What percent of test takers scored above 600?
13. (1 point) What percent of test takers scored between 450 and 550?
14. (1 point) What percent of test takers scored below 450 OR above 550?
15. (1 point) If a student was told that she ranked at the 84 th percentile, what was her test score?

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