statistics

CHAPTER ONE ASSIGNMENT The Basic Comcepts of Statistics Name Section True/False Questions 1. Using the average score to describe a sample is an example of inferential statistics. 2. A researcher is interested in the average income for registered voters in the United States. The entire group of registered voters is an example of a population. 3. The average score for a population is an example of a statistic. 4. A researcher Interested in vocabulary development obtains a sample of 3-year-old children to participate in a research study. The average score for the group of 20 is an example of a parameter. 5. The goal for an experiment is to demonstrate that changes in one variable are responsible for causing changes in a second variable. 6. An experimental research study typically involves measuring two scores for each individual in one group of participants. 7. A correlational study typically uses only one group of participants but measures two different variables (two scores) for each individual. B. A correlational study is used to examine the relationship between two variables but cannot determine whether it is a cause-and-effect relationship. 9. A recent report concluded that children with siblings have better social skills than children who grow up as an only child. This is an example of an experimental study. 10. A recent report concluded that college graduates have higher life-satisfaction scores than individuals who do not receive college degrees. For this study, graduating versus not graduating is an example of a quasi-independent variable. 51. The participants in a research study are classified as high, medium, or low in self- esteem. This classification involves measurement on a nominal scale. 52. A discrete variable must be measured on a nominal or an ordinal scale. 53. Classifying people into two groups on the basis of gender is an example of measurement on an ordinal scale. 54. Students in an introductory art class are classified as art majors and non-art majors. This is an example of measurement on a nominal scale. 55. To determine how much difference there is between two individuals, you must use either an interval or a ratio scale of measurement