To compare the effect of weather on sales of soft drinks, a soda manufacturer sampled two regions of the country with the following results. Is there a difference in sales between the 2 regions? Using the 1% level of significance, what is the critical value? _____________Region A______Region B Sample Size____1000__________1500 Sales__________400___________500

Which of the following designs refers to a study in which the units of analysis are populations or groups of people rather than individuals (select one best answer)?   Ecological study Case-control Study Cohort study Cross-sectional study None of the above

Do single-parent families tend to be more impoverished than families with two parents? In order to test if there is a relationship between family structure and family income level, family researcher studied a sample of 35 one-parent and 65 two-parent families in a particular city to determine whether their total family income fell below the poverty level. _________________________Family Structure____________________________ Total family Income               One Parent                  Two Parents                TOTAL Below poverty level                      24                                      20                        44     Not Below Poverty Level                                            11                                      45                         56 Total                                            35                                      65                        100 What are the independent and dependent variables.? What is the null hypothesis? What test should we use?…

Sample data were collected in a study of calcium supplements and their effects on blood pressure. A placebo group and a calcium group began the study with measures of blood pressures for each group. What test would be most appropriate, if you have non-normal data? Name of Test _____________________________________________