Astudy was done to examine the personal goals of elementary school children. a random sample of 500 students was selected from schools in the state of georgia. the students received a questionnaire regarding personal goals. they were asked what they would most like to do at school: get good grades, be popular, or be good at sports. the results are presented in the table, classified by the gender of the child. we wish to test the null hypothesis that gender and personal goal are independent. under the null hypothesis, the expected number of boys that would select "be good at sports" is

the concept of nucleosome occupancy, which reflects the fraction of cells from the population in which a given region of dna is occupied by a histone octamer

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion