Glossary of Terms
Statistics - a set of concepts, rules, and procedures that help us to:
understand statistical techniques underlying decisions that affect our lives
and well-being; and
make informed
Why Study Statistics:
The field of statistics provides the scientist with some of the most useful techniques for evaluating ideas,
testing theory, and discovering the truth.
Statistics . the most impo
What is a percentage?
Percent means for every 100 or "out of 100." The (%) symbol as a quick way to write a fraction with
a denominator of 100. As an example, instead of saying "it rained 14 days out
Recognizing the Impact of Statistics in Polls
A survey is an instrument that collects data through questions and answers and is used to
gather information about the opinions, behaviors, demographics,
Measures of Variability
and T-Scores
Aquavia Lightsey
Cashelia Lewis
Victoria King
Colton Lee
The Standard Deviation
Takes into account all of the scores.
Is the measure of how much all of the sc
Name:
Finding Median and Mode
Determine the best answer for the following problems.
A toy store was recording how much
money they earned each hour. Use the
graph of their results below to answer the
q
History of Statistics
The history of statistics can be said to start around 1749 although, over time, there have
been changes to the interpretation of the word statistics. In early times, the meaning
Calculate the Z score. To calculate the Z score of any sample, you just have to plug it
in to a simple formula: Z score = (sample value - sample mean)/standard deviation.
The result of that division i
Mean, Median, Mode, and Range
Mean, median, and mode are three kinds of "averages". There are many "averages" in statistics, but
these are, I think, the three most common, and are certainly the three
Calculating T-Scores:
T-Scores: have an average of 50 and a standard deviation of 10. Scores above 50 are above
average. Scores below 50 are below average.
T-scores are calculated using this formula:
CALCULATING STANDARD DEVIATION WORKSHEET
The standard deviation is used to tell how far on average any data point is
from the mean. The smaller the standard deviation, he closer the scores are
on aver