1. A regression analysis between sales (in P1000) and price (in pesos) resulted in the following equation: [y = 50,000 - 8X]. The above equation implies that an ______.
2. A random sample of 5000 students were asked whether they prefer a 10 week quarter system or a 15 week semester system. Of the 5000 students asked, 500 students responded. The results of this survey ________.
3. In a report by ABC News, the headlines read "City Living Increases Men's Death Risk" The headlines were based on a study of 3,617 adults who lived in the Philippines and were more than 25 years old. One researcher said, "Elevated levels of tumor deaths suggest the influence of physical, chemical and biological exposures in urban areas. Living in cities also involves potentially stressful levels of noise, sensory stimulation and overload, interpersonal relations and conflict, and vigilance against hazards ranging from crime to accidents." Is a conclusion that living in an urban environment causes an increased risk of death justified?
4. The best way to determine whether a statistically significant difference in two means is of practical importance is to?