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Name: February 6, 2001 Score:

MATH 147

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Quiz 2

(2 pts.)

Problem 1. In a list of numbers, the average is 28, the median is 30, and the standard deviation is 5. What is the number 32 in standard units?

(2 pts.)

Problem 2. On the midterm your grade was -1.2 standard units. The median score was a 60, the average was also a 60, and the SD was 10. What was your grade?

(3 pts.)

Problem 3. Find the area under the standard normal curve between -0.3 and 0.6.

(3 pts.)

Problem 4. Among all applicants to a university in one year, verbal sat scores had an average of 500 with an SD of 60. Estimate the 80^th percentile sat score using the normal curve.