David Pham Tran Essays (824 words) - Bacteriology, Rooms, Bacteria

David Pham Tran Essays (824 words) - Bacteriology, Rooms, Bacteria David Pham Tran Biology 10H Block 1 DRAFT OF RESULTS AND CONCLUSIONS RESULTS The purpose of this experiment was to test the colony counts of bacteria after growing them in the same amount of time. The independent variables of this project were the different locations in school that bacteria were being collected from. The locations were the doorknob at the staircase, the doorknob in the biology room, the bathroom sink, the bathroom toilet, the cafeteria table, the cafeteria railing, the water fountain, the locker combination, the floor of the biology room, and the hallway floor. The dependent variable was the number of colonies that grew from the bacteria. The control group is was the cafeteria table since it was constantly wiped. Quantitative data was used in this experiment and the level of data was ordinal. The ANOVA test was used to do the statistical analysis of the data. The means for the bacteria colonies of each location were respectively as follows: 32.6 for the staircase doorknob, 32.2 for the biology room doorknob, 44.2 for the bathroom sink, 32.2 f or the bathroom toilet, 28 for the cafeteria table, 15 for the railing in the cafeteria, 30.6 for the water fountain, 21.8 for the locker combination, 24 for the biology room floor, 15.8 for the hallway floor. The null hypothesis was if the different locations in school have no effect on the colony counts of the bacteria, then the averages of colonies will be slightly the same. The p-value of this experiment was 0.05, approximately 0.033. Due to the p-value the null hypothesis was rejected. The alternative hypothesis was if bacteria are collected from different locations in school, then the colony counts of bacteria will be the same. The results of this experiment did not support the alternative hypothesis. As shown below in Table 1: The Counts Of Colony Depend On The Locations In School, the standard variations were the following: 7.89 for the staircase doorknob, 11.5 for the biology room doorknob, 26.8 for the bathroom sink, 10.0 for the cafeteria table, 12.2 for the bathroom toil et, 8.63 for the cafeteria railing, 13.9 for the water fountain, 8.41 for the locker combination, 14.0 for the biology room floor, and 9.68 for the hallway floor. As shown in Graph 1: The Average Counts of Colony, the average counts of colony were shown as following: 32.6 for staircase doorknob, 32.2 for biology room doorknob, 44.2 for bathroom sink, 28 for cafeteria table, 32.2 bathroom toilet, 15 for cafeteria railing, 30.6 for water fountain, 20.8 for locker combination, 24 for biology room floor, 15.8 for hallway floor. TABLE 1: THE COUNTS OF COLONY DEPEND ON THE LOCATIONS IN SCHOOL Descriptive Information Staircase doorknob Biology room doorknob Bathroom sink Cafeteria table Bathroom toilet Mean Standard Deviation Number 32.6 7.89 5 32.2 11.5 5 44.2 26.8 5 28.0 10.0 5 32.2 12.2 5 *Continue of the previous table due to lack of space Descriptive Information Cafeteria railing Water fountain Locker combination Biology room floor Hallway floor Mean Standard Deviation Number 15.0 8.63 5 30.6 13.9 5 20.8 8.41 5 24.0 14.0 5 15.8 9.68 5 Results of ANOVA *(This include both of the previous tables) Between groups F= 2.319 p0.01 (0.033) df= 49 CONCLUSIONS The purpose of this experiment was to test the colony counts of bacteria after growing them in the same amount of time. The alternative hypothesis that the colony counts of the bacteria would be slightly the same even though they were collected from different locations was rejected. The reason why the results did not support the alternative hypothesis was because the colony counts of the bacteria turned out to be very different. The highest number of colony found in one petri dish was 84 and the lowest was 6. Only 3 out of 10 group average were in the range of 30 to 35 and only one group average was higher than 40. These results above were not enough to support the alternative hypothesis. To support the alternative hypothesis 7 out of 10 groups had to have the average in the same range. The independent variable (the different locations that bacteria were collected from) had this effect on the dependent variable (colonies) was because it depended on how dirty the locations were. If on e location was extremely dirty like the bathroom sink or toilet, the more bacteria will be collected and the more colonies will grow. According to the literature review, bacteria would need at least 24 hours to be visible. The bacteria were ensured to be visible and develop as many colonies by leaving

Hans Christian Andersen Biography

Hans Christian Andersen Biography Hans Christian Andersen was a famous Danish writer, known for his fairy tales, as well as other works. Birth and Education Hans Christian Andersen was born in the slums of Odense. His father was a cobbler (shoemaker) and his mother worked as a washerwoman. His mother was also uneducated and superstitious. Andersen received very little education, but his fascination with fairy tales inspired him to compose his own stories and arrange puppet shows, on a theater his father had taught him to build and manage. Even with his imagination, and the stories his father told him, Andersen did not have a happy childhood. Hans Christian Andersen Death: Andersen died in his home in Rolighed on August 4, 1875. Hans Christian Andersen Career: His father died when Andersen was 11 (in 1816). Andersen was forced to go to work, first as an apprentice to a weaver and tailor and then in a tobacco factory. At the age of 14, he moved to Copenhagen to try a career as a singer, dancer and actor. Even with the support of benefactors, the next three years were difficult. He sang in the boys choir until his voice changed, but he made very little money. He also tried the ballet, but his awkwardness made such a career impossible. Finally, when he was 17, Chancellor Jonas Collin discovered Andersen. Collin was a director at the Royal Theater. After hearing the Andersen read a play, Collin realized that he had talent. Collin procured money from the king for Andersens education, first sending him to a terrible, taunting teacher, then arranging a private tutor. In 1828, Andersen passed the entrance examinations to the university in Copenhagen. His writings were first published in 1829. And, in 1833, he received grant money for travel, which he used to visit Germany, France, Switzerland, and Italy. During his journey, he met Victor Hugo, Heinrich Heine, Balzac, and Alexandre Dumas. In 1835, Andersen published Fairy Tales for Children, which contained four short stories. He eventually wrote 168 fairy tales. Among Andersens best known fairy tales are Emperors New Clothes, Little Ugly Duckling, The Tinderbox, Little Claus and Big Claus, Princess and the Pea, The Snow Queen, The Little Mermaid, The Nightingale, The Story of a Mother and The Swineherd.In 1847, Andersen met Charles Dickens. In 1853, he dedicated A Poets Day Dreams to Dickens. Andersons work influenced Dickens, along with other writers like William Thackeray and Oscar Wilde.