Part 3 Module 1 Calculations involving percents The bar graph summarizes the responses of a number of dogs who were asked “What is your favorite food?” What percent said “cats”? A. 6%B. 17%C. 11%D. 30%

Percent increase, percent decrease If a quantity is increasing or decreasing over time, then to calculate the percent increase or percent decrease, again we start with a fraction, and then turn the fraction into a decimal number, and then into a percent. For this calculation, the baseline (the number in the denominator) is the beginning amount (that is, the quantity before the increase or decrease occurred). The number in the numerator is the amount of increase or decrease.

Percent increase, percent decrease In July, Gomer had 12 pet wolverines and 10 fingers. In August, he had 15 pet wolverines and 8 fingers. 1. Find the percent increase in his wolverines. A. 25%B. 125%C. 30%D. 3% 2. Find the percent decrease in his fingers. A. 80%B. 180%C. 20%D. 120%

A Procrustean Bed Question: What is a Procrustean Bed? A. An unreasonable standard... B. A subterranean geological formation... C. A spawning site for crabs and crayfish... D. I have no clue.

A Procrustean Bed Before Andy spent the night at Procrustes' inn, Andy was 5 feet, 6 inches tall. The next morning, Andy was 6 feet, 4 inches tall. Find the percent increase in height. A. 0.25%B %C %D %

Percentile Rank Question: Suppose your percentile rank on the SAT verbal was 85. What does that score mean? A. 85% of people who took the test got higher scores than you. B. You answered 85% of the questions correctly. C. 85% of people who took the test got lower scores than you. D You answered 85% of the questions incorrectly. E. All of the above.

Percentile Rank The percentile rank of a score in a distribution tells the percent of scores that were less than that score. A “score” in this context can be any quantity that can be sampled from a population or group. If, among the population of adult males, the percentile rank of Gomer’s body weight is 53, it means that 53% of adult males weigh less than Gomer.

Percentile Rank In this course, any question involving percentile rank will be very simple, requiring no calculation at all. The question will just test whether you know the definition of percentile rank. Many people will answer incorrectly, because they don’t understand the definition: The percentile rank of a score in a distribution tells the percent of scores that were less than that score.

Percentile Rank The table below shows the percentile distribution of scores on the final exam in the course Basic College Organ Transplantation. What percent of students had scores less than 52? score Percentile Rank A. 9% B. 63% C. 54%D. 14%