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Chapter 1 - STA 2210 Exam Questions and Complete Solutions Graded A+
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Chapter 1 - STA 2210 Exam Questions and Complete Solutions Graded A+
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Chapter 1 - STA 2210Exam Questions and
Complete Solutions
Graded A+
statistics - Answer: The collection and classification of data that are in the form of numbers;
The science of collecting, analyzing, and drawing conclusions from data
statistical question - Answer: A question that has many different, or variable, answers (variability);
A question that anticipates and accounts for a variety of answers;
A question such that:
- there are variety of answers
- decision is made in the presence of variability and uncertainty
- the goal is to find the distribution of different answers which help us understand the general tendency
variability - Answer: The extent to which the scores in a data set tend to vary from each other and from
the mean;
The measure of how loosely or tightly bunched scores are;
In a set of numbers, how widely dispersed the values are from each other and from the mean
, data analysis process - Answer: 1. Understand the nature of the problem
2. Decide what to measure and how to measure it
3. Collect data
4. Summarize data and perform preliminary analysis
5. Perform formal analysis
6. Interpret results
population - Answer: A group of individuals that belong to the same species and live in the same area;
The entire collection of individuals or objects about which information is desired
parameter - Answer: A characteristic or constant factor, limit, numerical summary of a population;
A certain (unknown) characteristic of the population that we are interested to infer about
example: average GPA of the entire population
census - Answer: A complete enumeration or official count of a population;
population count;
A data collection method performed to gather information about the entire population
example: surveying the demographics of a university
sample - Answer: A relatively small proportion of people who are chosen in a survey so as to be
representative of the whole;
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