Much concern has been expressed regarding the practice of using nitrates as meat preservatives. in one study involving possible effects of these chemicals, bacteria cultures were grown in a medium containing nitrates. the rate of up take of radio-labeled amino acid (in dpm, disintegrations per minute) was then determined for each culture, yielding the following observations:

7251 6871 9632 6866 9094 5849 8957 7978 7064 7494 7883 8178 7523 8724 7468

suppose that it is know that the mean rate of uptake for cultures without nitrates is 8000. do the data suggest that the addition of nitrates results in a decrease in the mean rate of uptake? test the appropriate hypotheses using a significance level of 0.10.

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

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.