BAYLOR KAY QBA FINAL EXAM QUESTIONS & ANSWERS 2024/2025
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BAYLOR KAY QBA
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BAYLOR KAY QBA
BAYLOR KAY QBA FINAL EXAM QUESTIONS & ANSWERS 2024/2025
What is statistics? - ANSWERSThe science of collecting, organizing, presenting, analyzing and interpreting data to assist in making more effective decisions.
2 types of Statistics - ANSWERSInferential and Descriptive
Inferential - A...
BAYLOR KAY QBA FINAL EXAM
QUESTIONS & ANSWERS 2024/2025
What is statistics? - ANSWERSThe science of collecting, organizing, presenting, analyzing and interpreting
data to assist in making more effective decisions.
2 types of Statistics - ANSWERSInferential and Descriptive
Inferential - ANSWERSprocedures that involve using sample data to draw conclusions about a larger
population.
Descriptive - ANSWERScreating tables, charts, and numerical summaries (like averages) in an attempt to
condense a large amount of information
Population - ANSWERSThe entire set of individuals or objects of interest
Sample - ANSWERSA portion of the population
Statistic - ANSWERSNumerical measure of the sample
Parameter - ANSWERSNumerical measure of the population.
Sampling Error - ANSWERSThe difference between the parameter and the statistic.
What are the two types of data that we study? - ANSWERSQualitative Data and Quantitative Data
Qualitative Data - ANSWERS-possesses quality not amount
-Ordinal: categories have an implied ordering (ex. Size of High school 1A, 2A, 3A or ratings...below
average, average, above average)
Quantitative Data - ANSWERS-results from a count or measure
-2 types:
-Discrete:usually counting something (how many football games are there)
-finite set number of values
-Continuous: typically measuring something
-theoretically infinite number of possible values
-weight, height, GPA, a number line
What does skewed left mean? - ANSWERSmeans that the tail end is pointing to the left
What does skewed right mean? - ANSWERSmeans that the tail end is pointing to the right
Arithmetic Mean - ANSWERS(population Mean) Sum of all the data values/ total data scores
(Sample Mean) sum of data values/ sample size
What are the properties of the mean? - ANSWERS1. the mean is the most widely used measure of
central location
2.all the possible values are used in this location
3.it is a balance point for a set of data
4.Xi(data value)-Xbar(average) E(Xi-Xbar)=0 the data above and below the mean will cancel each other
out.
Median - ANSWERSthe center midpoint for a set of data
-find it by arranging the data from low to high
-locate its position n+1/2
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