Measures of Dispersion

1. A nutritionist obtains the amounts of sugar (grams) from 10 different cereals, including Cheerios, Com Flakes, Froot Loops, and seven others. The amounts are listed below: 6, 24, 33, 47, 43, 7, 41, 23, 44, 39. Find the standard deviation of the amount of cereal sugar consumed by the population of all Puerto Ricans who eat cereal. 2. The monthly salary of five (5) employees of a pharmaceutical company was as follows: $ 3,667, $ 4,935, $ 3,876, $ 4,700 and $ 3,178. What should the value of the standard deviation be for those data? 3. The waiting times of eight (8) patients to be seen in a medical office, expressed in minutes, were the following: 34, 46, 42, 29, 31, 34, 51, 63. Calculate the following: range, variance, and standard deviation. 4. The ages of the 10 best actresses in Hollywood are: 33, 48, 51, 35, 57, 67, 52, 44, 48, 70. Use the 10 ages of the best actresses to calculate the interquartile range. 5. Use the following sample data to calculate the coefficient of variation for each sample; then compare the results. -Weight of students of both sexes at NUC University: 159, 165, 197, 200, 165, 143, 154 -Size in inches of babies at birth: 12.2, 15.3, 11.4, 10, 15.8, 13.5, 14.1 6. The frequency distribution presented describes the speed at which some young people drove to get to take their classes at the university. These young people were driving on a road with a speed limit of 35 mi / h. Calculate the variance and standard deviation. Velocidad Frecuencia 42-45 20 16-49 16 50-53 11 54-57 4 58-61 7. The following sample data are presented: 5.1, 3.1, 5.5, 5.1, 8.3, 13.7, 5.3, 4.9, 3.7, 3.8, 9.8. Calculate the following: a) mean b) fashion c) median d) median axis e) range f) variance g) standard deviation