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Name: February 8, 2001 Score:

MATH 147

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Quiz 3

(2 pts.)

Problem 1. Circle T for a true statement, F for a false statement.

T F Repeated measurements can help reduce bias.

T F The average is sensitive to outliers, but not the standard deviation.

(2 pts.)

Problem 2. If the average salary at MegaCorporation Inc. is $20,000 with an SD of $5,000 and every employee receives a bonus of $10,000 what is the average salary and SD after the bonus?

(3 pts.)

Problem 3. Find the 30^th percentile for a list of numbers that follows the normal histogram, has a mean of 100 and a standard deviation of 15.

(3 pts.)

Problem 4. Among all applicants to a university in one year, verbal sat scores had an average of 550 with an SD of 50. Approximate the percentage of people that scored between 500 and 650 that year.