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MATH 153 Chapter 1
Data Collection & Terminology
Question | Answer |
---|---|
Two types of data | Qualitative and Quantatative |
Two types of quantatative data | Discrete and Continuous |
True or False: Statistics is the art and science of collecting, organizing, summarizing, and analyzing data. | True |
Which is an example of descriptive statistics? a) a prediction of next month's employment rates b) making a bet based on a player's current stats c) the median height of women 25 years of age | c) the median height of women 25 years of age |
Name three data collecting methods | Survey, observational study, experimental study |
True or False: Systematic sampling is the easiest sampling technique for the collector. | False: Convenience sampling is the easiest for the collector. |
You want to find out employee satisfaction for your company based on race. The majority of employees are white. Which sampling method will give the most accurate data? a) random sampling b) stratified sampling c) cluster sampling d) systematic sampling | b) stratified sampling |
Define statistics. | Statistics is the science of collecting, organizing, summarizing, and analyzing information to draw a conclusion and answer questions. In addition, statistics is about providing a measure of confidence in any conclusions. |
Determine if the variable is qualitative or quantitative. Complete parts A to C below. A) age B) favorite food C) number of people divorced this year | A) quantitative B) qualitative C) quantitative |
Starbucks contacts 2005 of their employees who also attend college and work full-time and ask whether they are finding enough time for school while working full-time. What is the population in the study? What is the sample in study? | Population: employees who work full-time and attend college Sample: the 2005 employees who work full time and attend college |
Which allows the researcher to claim causation between an explanatory variable and a response variable? a. A designed experiment b. An observational study | a. A designed experiment |
A(n) _____________ is a numerical summary of a sample. | Statistic |
A(n) ______________ is a numerical summary of a population. | Parameter |
________________ are the characteristics of the individuals of the population being studied. | Variables |
Which sampling method does not require a frame? a. Systematic b. Simple random c. Stratified d. Cluster e. All of the above sampling methods require a frame | a. Systematic |
True or false: A closed question has fixed choices for answers, whereas an open question is a free-response question. | True |
Which sampling method is obtained by dividing the population into homogeneous groups and randomly selecting individuals from each group? a. Systematic b. Simple random c. Stratified d. Cluster | c. Stratified |