Inferential statistical procedures are used to - answer-make inductive inferences of population parameters using sample statistics
Interval estimates quantify - answer-level of uncertainty regarding true value of a parameter
why are descriptive statistics necessary - answer-whenever simple qu...
INFERENTIAL STATISTICS EXAMINATIONS
WITH ANSWERS
Inferential statistical procedures are used to - answer-make inductive inferences of
population parameters using sample statistics
Interval estimates quantify - answer-level of uncertainty regarding true value of a
parameter
why are descriptive statistics necessary - answer-whenever simple quantitative
description is required
why are inferential statistics necessary - answer-only when a quantitative inductive
inference about population parameter(s) needs to be made
Using inferential statistics, you are trying to reach a conclusion that - answer-
extends beyond immediate data alone - to make inductive inferences about
population parameters based on probability.
inferential statistics is what type of inference - answer-probabilistically-based
inductive inference
ways we use inferential statistics - answer-estimation and hypothesis testing
types of estimation - answer-point(mean, variance, SD and proportions)
and interval(CI and margin of error)
what is a point estimate - answer-A single value for a sample summary statistic
representing the "best guess" value of a parameter.
a ________ is a point estimate of the ________ which is also called______ - answer-
sample mean
population mean
parameter
The best inference of a population mean is? what about a population SD - answer-a
sample mean.
a sample SD
why is There is always uncertainty about how close a sample statistic is to the
unknown population parameter. - answer-A point estimate, by itself, provides no
information on the degree of uncertainty.
Due to sampling error we can only infer from samples to population parameters.
[Type here]
, 1
1
Interval estimation is a - answer-range of values around a point estimate that, with
a specified level of certainty or probability, enclose the true parameter.
what does an interval measure - answer-CI and margin of error
what is probability - answer-the chance that an event will happen relative to all
possible events that could happen - under defined conditions.
probability can be used to quantify - answer-quantify how sure (or unsure) one is
about the truth of a proposition or statement.
what is a model - answer-All probability statements are based on a set of
assumptions or conditions
ex-under these conditions, the prob of x is y%
All probabilities are - answer-ratios. It is essential to define both the numerator
(particular event occurs) and denominator (number of all possible events, given
conditions).
what is an interval - answer-a range of values around a point estimate made on a
sample
what is a CI - answer-a quantitative measure of how certain we can be that a
specific interval contains the true parameter
what does heterogeneity mean - answer-variation, scatter
what does heterogeneity mean - answer-
most common CI - answer-95%
the bigger the CI the - answer-more uncertainty and less precise inference
the length of CI is - answer-a measure of our level of uncertainty about a parameter
------ *precision of inference*
the smaller CI is - answer-the less uncertainty and more percise our inference
SD measures - answer-scatter in data(dispersion)
what does CI length depend on - answer-sample size (want this to be big) and
random variation(SD)(want this to be small)
Less random variation (smaller sample SD) means - answer-less uncertainty of
inference = better precision.
[Type here]
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 or Stuvia-credit 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 TOPDOCTOR. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.99. You're not tied to anything after your purchase.
