One important aspect in statistics is to understand which statistical methods or procedures are appropriate to use to address the research problem or question of interest. For each description of a research question below, clearly select and write the letter corresponding to the statistical analysis technique most appropriate for addressing that research question. A. 1-sample t-test for a population mean ANOVA 1. B. C. 2-sample t-test for the comparison of two population means 2. D. Linear regression model 3. 1 A researcher at the National Highway Traffic Safety Administration (NHTS) plans to obtain a random sample of 120 drivers from across the US and will record for each driver whether or not they usually use their seat belt and the region where they live (North, South, East, or West). The researcher wishes to assess if there is an association between seat belt usage and region. A new sprinkler system is being installed at a large office complex. The manufacturer of the new system claims the mean activation time is less than 25 seconds. A set of fire alarm/sprinkler system tests were performed and the activation time in seconds) for reach test were recorded to assess the manufacturer's claim. A medical researcher conjectured that smoking might result in wrinkled skin around the eyes. She will randomly sample 150 smokes and 250 nonsmokers and record whether or not they have prominent wrinkles around their eyes to assess if there is a higher incidence of wrinkles for the smoking population as compared to the nonsmoking population. Plants emit gas that trigger the ripening of fruit, attract pollinators, and cue other physiological responses. Researchers were interested in whether plants with more mass emitted more of these gasses (1.e., that the amount of gas a plant emitted in hundreds of nanograms could be predicted by the plant's weight in grams). They collected data on the weight and volatile compounds emitted for 11 potato plants. Is bone marrow density (BMD) related to clinical depression? Researchers conducted an observational study on approximately 2,000 Hong Kong men aged 65 to 92 years old. Each participant in the study was classified as either depressed' or 'not depressed and as either osteoporotic, Low BMD' or 'Normal BMD.' The researchers hope to use the collected data to assess whether BMD and depression share an association. Approximately 450,000 vasectomies are performed each year in the US. In this surgical procedure for contraception, the tube carrying sperm from the testicles is cut and tied. Several studies have been conducted to analyze the relationship between vasectomies and prostate cancer. The results of one such study found that of 21,300 men who had not had the procedure, 69 were found to have prostate cancer, of 22,000 men who had had a vasectomy, 113 were found to have prostate cancer. The researchers hope to assess if having a vasectomy increases the risk of prostate cancer. Previous research has suggested that changes in the activity of dopamine, a neurotransmitter in the brain, may be a causative factor for schizophrenia. To assess this possibility, researchers plan to measure the enzyme dopamine beta-hydroxylase (in nanomoles per milliliter-hour per milligram) among 25 schizophrenic patients and compare the data between those who had been classified as psychotic by hospital staff to those who have not. In 2010, the Federal Highway Administration reported that the average car was driven 12,400 miles. Researchers believe that changes in housing markets has increased the commute for many Americans, and that this average annual mileage may have changed in the past nine years. They plan to randomly sample 500 cars and record the number of miles they drive between Jan 1, 2020 and Dec 31, 2020, to help assess whether their suspicion is well-founded. E. 2-sample 2-test for the comparison of two population proportions F. 1-sample 2-test for a population proportion G. x test of independence H. x test of goodness of fit 6. 7. 8