Category «Flashcards»

ECN225-EXAM1 FURMAN ROE

Question Answer Compare a 'population' to a 'sample'. Pop = set of all measurements of interestSample = subset of the population Compare a 'parameter' to a 'statistic'. Parameter = a # deduced from the populationStatistic = a # taken from the sample data What is the problem with populations/parameters? Or, why do we use samples/statistics …

CH 5, 6, 7, & 8

Question Answer Raw score An original, untransformed observation or measurement. Z-score A standardized score with a sign that indicates direction from the mean (+ above µ and – below µ), and a numerical value equal to the distance from the mean measured in standard deviation. Z-score transformation A transformation that changes raw scores (X values) …

Vocabulary

Question Answer Statistics the study of how to collect, organize, analyze, and interpret numerical imformation from data Individuals people or objects included in the study Variable the characteristic of the individual to be measured or observed Quantitative variable has a value or numerical measurement for which operations such as addition or averaging make sense Qualitative …

States vocabulary

Question Answer Observational study a study based on data with no manipulation used retrospective study subjects are selected and than their previous conditions or behaviors are determined. Not based on random sampling Focus on estimating differences between groups or associations between variables prospective study subjects are followed to observe future outcomes. No treatment are applied. …

Stats basics, chapters 1, 2

Question Answer Statistics Paradigm Population -> Sample -> Statistics Parameter measurement of a population Statistic Measurement of a sample Error formula 1/(sq rt of N) Variable something with more than one value (ex age, weight, grade) Explanatory Variable Explains why the study's being done/how groups are broken up Mean Average Confidence Interval is set by …

Parameter vs Statistic & Sample vs Population

Question Answer population is the entire group of objects you want to study. ex: scores, people, measurements sample is a smaller subset chosen from the population and a representative of the population. parameter is a number which describes a property of only a sample. random sample every object in the population is equally likely to …

Stats Quiz 5/29

Question Answer Cross-sectional study data collected at a fixed point in time Retrospective (case controlled) study data collected about the past (records, interviews, etc) Prospective study data collected in the future from groups sharing common factors Randomization Randomly select subjects for different groups Replication Results can be repeated on more than one subject to reach …

Chapter 1.3-1.5

Term Definition Parameter Measure of the whole population describing a characteristic Statistic Measure of a sample describing some characteristic (not the whole population) Quantitative data Data expressed by numbers Categorical data Data that consists of names or labels that are not expressed in numbers Discrete data Values are finite or countable Continuous data Infinitely many …

Ellis Third Exam- 4/3/12

Question Answer A type 1 error is the result of Incorrectly rejecting the NULL hypothisis A research article results of a test using dependent means as (38)=3.11. <01 the result is significant When conducting a test for independent means a typical research hypothesis might be The mean of population 1 is greater than the mean …