Exam (elaborations)
Statistics CBIC.
- Module
- TEAS Practice.
- Institution
- TEAS Practice.
Exam of 5 pages for the course TEAS Practice. at TEAS Practice. (Statistics CBIC.)
[Show more]
Seller
Follow
Content preview
Statistics CBICA high sensitivity test is when a negative rules out disease - ANS-A high specificity test
is when a positive rules in disease.
A negative numbers indicates - ANS-skew to the left
A value of 0 means - ANS-there is no skew
Attack Rate - ANS-is a special form of incidence rate. Is truly not a rate. Is a proportion
of persons at risk.
# of new cases/ population at risk x100
Basic Formula for all Types of Rates - ANS-Rate= X/Y x K
Cause Specific Mortality Rate - ANS-X/Y X 100,000
Central Tendency - ANS-measures of central tendency describe how observations
cluster around a middle value and locate only the center of a distribution measure.
mean, median, mode
Confidence Interval - ANS-A sample is an estimate of the population mean. It is a point
estimate that may include some error. To compensate for this margin of error, a
calculation is performed to identify a range of possible values the pop. mean might take.
the range of values within which a population parameter is estimated to lie
to calculate a CI, the data must have a normal distribution.
Correlation - ANS-a scattergram is used.
Correlation - ANS-Calculates a value R Range +1 to - 1
A positive correlation exists as 1 variable increases.(so does the other ie: the longer a
catheter in place the greater the chance of a UTI)
A negative correlation exists as 1 variable increases; the other decreases (ie: increased
hand hygiene, results in fewer infections).
Crude Mortality Rate - ANS-X/Y X 1000=
, Fisher's exact test - ANS-used in place of the x2 when the sample size is less than 20
or any one cell in the table is less than 5.
If RR < 1 - ANS-there is a negative association (protective)
If RR=1 - ANS-There is no significant association
If RR>1 - ANS-there is a positive association (worse outcome)
If the mean is greater than the median - ANS-it has a negative skew
Incidence density rate - ANS-accounts for varying time periods of follow-up
Usually used in a cohort studies of diseases with long incubation or latency periods,
such as chronic diseases.
# of cases (during observation period) /the time each person was observed (totaled for
all persons) x 10.
inferential statistics - ANS-makes an assumption about a population based on a small
sample size and is used to show an association between cause and effect. ( ie: election
polls, medical testing, environmental monitoring)
Is P value is .05 - ANS-the the p value less than .05 would cause you to reject the null
hypothesis
Kurtosis - ANS-Measure of the fatness of the tails of a probability distribution relative to
that of a normal distribution. Indicates likelihood of extreme outcomes.
How flat or peaked a curve
Leptokuric - ANS-More peaked than normal distribution (positive numbers)
(lepto klepto, skinny people steal)
Level of Significance - ANS-The probability value arbitrarily chosen by the researcher as
the desired level of probability at which one may feel secure in rejecting the null
hypothesis.
Lurking or confounding variables - ANS-when you cannot rule out the possibility that the
observed effect is due to some other variable rather than the factor being studied
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller modockochieng06. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.37. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80461 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now