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MATH 225N Statistics Final Exam Study Guide – Chamberlain College of Nursing 2025 | Questions & Answers with Explanations

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This comprehensive study guide covers all major topics tested on the MATH 225N Statistics Final Exam at Chamberlain College of Nursing. The document contains terms and matched answers drawn directly from exam-style questions, making it an ideal tool for last-minute review or structured studying throughout the course. Topics covered include data classification (discrete vs. continuous, qualitative vs. quantitative), levels of measurement (nominal, ordinal, interval, ratio), and types of sampling methods such as cluster, stratified, systematic, and simple random sampling. The guide also addresses observational study designs including cross-sectional and cohort studies, as well as the distinction between experiments and observational studies. Descriptive statistics concepts are thoroughly reviewed, including measures of central tendency (mean, median, mode), measures of dispersion (range, IQR, standard deviation), and the five-number summary. Probability topics include classical probability, complement rules, addition and multiplication rules, independent and disjoint events, permutations, combinations, and expected value calculations. The guide covers discrete probability distributions, normal distributions, z-scores, the Central Limit Theorem, and the standard error of the mean. Inferential statistics topics include confidence intervals for means and proportions, sample size determination, point estimates, and hypothesis testing including P-values and Type I errors. Linear regression concepts such as correlation coefficients, R², slope interpretation, and lurking variables are also included. This document is an excellent resource for nursing students aiming to pass their statistics final with confidence.

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MATH 225N Statistics Final EXAM – Chamberlain
College of Nursing MATH 225N – MATH
CHAMBERLAIN COLLEGE OF NURSING 2025!!

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Terms in this set (141) Hide definitions




the number of goals scored in a discrete
hockey game


A scientist was studying the effects experiment
of a new fertilizer on crop yield. She
randomly assigned half of the plots
on a farm to group one and the
remaining plots to group two. On the
plots in group one, the new fertilizer
was used for a year. On the plots in
group two, the old fertilizer was
used. At the end of the year the
average crop yield for the plots in
group one was compared with the
average crop yield for the plots in
group two.

,Identify the type of sampling used. cluster


A travel industry researcher
interviews all of the passengers on
five randomly selected cruises. What
sampling technique is used?


Identify the type of sampling used. simple random


A lobbyist for the oil industry assigns
a number to each senator and then
uses a computer to randomly
generate ten numbers. The lobbyist
contacts the senators corresponding
to these numbers. What sampling
technique was used?

,Determine what type of cross-sectional; Information is collected at a
observational study is described. specific point in time.
Explain.


Researchers wanted to determine
whether there was an association
between high blood pressure and
the suppression of emotions. The
researchers looked at 1800 adults
enrolled in a Health Initiative
Observational Study. Each person
was interviewed and asked about
their response to emotions. In
particular they were asked whether
their tendency was to express or to
hold in anger and other emotions.
The degree of suppression of
emotions was rated on a scale of 1 to
10. Each person's blood pressure was
also measured. The researchers
analyzed the results to determine
whether there was an association
between high blood pressure and
the suppression of emotions.


Identify the type of sampling used. stratified


Thirty-five math majors, 47 music
majors and 51 history majors are
randomly selected from 376 math
majors, 591 music majors and 267
history majors at the state university.
What sampling technique is used?

, Determine what type of cross-sectional; Information is collected at a
observational study is described. specific point in time.
Explain.


Researchers wanted to determine
whether there was an association
between high blood pressure and
the suppression of emotions. The
researchers looked at 1800 adults
enrolled in a Health Initiative
Observational Study. Each person
was interviewed and asked about
their response to emotions. In
particular they were asked whether
their tendency was to express or to
hold in anger and other emotions.
The degree of suppression of
emotions was rated on a scale of 1 to
10. Each person's blood pressure was
also measured. The researchers
analyzed the results to determine
whether there was an association
between high blood pressure and
the suppression of emotions.


Provide an appropriate response. closed question


Multiple choice questions on a test
that include as one of the choices
"none of the above" are an example
of what type of question?

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