Statistics Homework 9/5/15
PROBLEMS #1-39 ODDS
1 The term “statistics” describes the process of collecting representative data, organizing and summarizing the information, recording or inputing your data into a system, and determining weather the results accurately reflect reality.
3 An individual is a person or object that is a member of the population being studied.
5 A statistic is a numerical summary of a sample. A parameter is a numerical study of a population.
7 Statistic
9 Parameter
11 Statistic
13 Parameter
15 Qualitative
17 Quantitative
19 Quantitative
21 Qualitative
23 Continuous
25 Discrete
27 Continuous
29 Continuous
31 Nominal
33 Interval
35 Ordinal
37 Interval
39 In this problem, the population was teenagers between the ages of 13 and 17 living in the United States. The sample, in this case, were the 1028 teenagers contacted in the study.
PROBLEMS #11,13
11 This is an example of a designed experiment because, initially, when the students are divided and taught differently, the researcher controls and assigns the groups. Because the groups were taught differently, the researcher also intentionally varied the amount of the explanatory variable (method of learning) to record the response variable (test proficiency).
13 This is an example of an observational study. The sole intention of the survey was to measure the response, and not to influence the outcome in any way. Therefore, while the response is still recorded, the researcher is not able to claim causation.