An experiment was done to see whether Vitamin C prevents colds. 100 people were randomly assigned to treatment (2,000 mg Vitamin C daily) and 100 to control (2,000 mg placebo daily) The treatment group averaged 2.3 colds in a year with an SD of 1.6 and the control group averaged 2.6 colds with an SD of 1.9. The question is: Is this a real difference or is that just due to chance

What is 32+4 x (16 x 1/2) -2 show your work}

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.