TEST #1 Overview (Online)
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Greenville Technical College *
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Course
120
Subject
Mathematics
Date
Feb 20, 2024
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docx
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Uploaded by DeaconSeaLion2614
TEST #1 OVERVIEW
MAT120
1. The definition of statistics the science of collecting, organizing, summarizing, and analyzing information
to draw conclusions or answer questions. In addition, statistics is about providing a measure of confidence in any conclusions.
2. Definition of qualitative and quantitative variables and giving an example of each
Qualitative: Allow for classification of individuals based on some attributes or characteristics.
Ex temp
Quantitative: provide numerical measures of individuals. The values of quantitative variables can be added or subtracted and provide meaningful results. Ex. Zip code
3. Given a scenario, identifying the correct sampling method (4)
Simple: Using Chance to select individuals to include
Stratified: Separating the population into nonoverlapping groups called strata then obtaining a simple random sample from each stratum. Individuals within each stratum should be similar in some way.
Systematic: is obtained by selecting every Kth individual from the population. The first individual is a random number between 1 and k
Cluster: Is obtained by selecting all individuals within a randomly selected collection or group of individuals.
4. True/false question regarding populations, parameters, samples and statistics
5. Given a scenario, identifying designed experiments and observational studies (3)
6. Giving an example of bias in sampling and a remedy
7. Given a frequency distribution, calculating relative frequencies for each class
8. Given a histogram, identifying the shape of the distribution; interpreting information from the histogram; identifying best measure of central tendency to use and explaining why you made that selection
9. Given a data set that can either be copied and pasted into StatCrunch or directly entered manually, calculating and/or identifying measures of central tendency, variation and quartiles
10. Interpreting a quartile in reference to percentiles
11. Calculating and interpreting the Interquartile Range in the context of the sample
12. Identifying the 5-number summary for a data set
13. Explaining what the standard deviation indicates in a set of data 14. Given StatCrunch summary outputs for two different individuals, identifying which one is more consistent and defending your conclusion
15. Defining what the z-score represents for a data value
16. Calculating Z-score; interpreting z-score; telling which z-score indicates either higher relative standing
or lower relative standing
17. Interpreting a percentile rank
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