stat 121 Questions and Correct Answers/
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The purpose of statistics is
Ans: to convert data into useful information
population
Ans: group we want to stdy to study
the four steps in stats
Ans: Produce data, Exploratory data analysis, Probability,
Inference
Sample
Ans: sub-group of the population
Sample preferred over population
Ans: less expensive, less time consuming, collecting data of
population is impossible
stat info is
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Ans: misleading and misinterpreted
All stats summaries and conclusions should be reported
Ans: in context
stat problem solving process
Ans: collecting data, summarizing data, interpreting data
probability
Ans: the way that we are allowed to draw conclusions about
the population based on the data of the sample
individual
Ans: the person or object we are the doing the study on
pie charts can be use to visualize
Ans: categorical data but bar graphs are preferred
advantage of a histogram over a stem/dot plot
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Ans: works well for large data sets
shape center spread have __ meaning for bar graphs
Ans: no
mu
Ans: population mean
M
Ans: median
s
Ans: sample standard deviation
x-bar
Ans: sample mean
p
Ans: population proportion
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