Exam (elaborations)
BST 322 Week 2 A+ Questions and Answers 2024.
- Course
- Institution
BST 322 Week 2 A+ Questions and Answers 2024.
[Show more]
Seller
Follow
lydiaomutho
Content preview
BST 322 Week 2 A+ Questions andAnswers 2024
Sampling error - ANS-(SEM) The difference between the sample value and the
parameter. Error in a statistical analysis arising from the unrepresentativeness of the
sample taken. Reflects the tendency for statistics to fluctuate from one sample to
another.
Sampling distribution - ANS-Are actually probability distributions, is central to estimates
of sampling error.
Sampling distribution of the mean - ANS-A theoretical probability distribution of the
means of an infinite number of samples given size from a population.
Standard error of the mean - ANS-The standard deviation of the sampling distribution of
the sample mean.
Point estimation - ANS-Involves calculating a single statistics to estimate the parameter.
Confidence interval aka Interval Estimate - ANS-Result adjusted by adding and
subtracting the margin of error
Null hypothesis - ANS-The hypothesis that there is no significant difference between
specified populations, any observed difference being due to sampling or experimental
error.
Alternate hypothesis - ANS
Type I error - ANS-false positive
Type II error - ANS-false negative
Alpha level - ANS-Indicates the area in the theoretical probability distribution that
corresponds to the rejection of the null hypothesis. It s the area under the probability
distribution that is outside (above and below) the confidence limits, i.e., it is the total
"shaded" area. It is equal to 1.00 minus the size of the confidence interval, thus a 95%
, confidence interval has an alpha value of 5% (or, 0.05).
Beta - ANS-The probability of making a Type II error.
Power - ANS-The probability that a test will reject a false null hypothesis.
Parametric tests - ANS-Involve estimating a parameter
Non-parametric tests - ANS-Do not test hypotheses about population parameters.
One-tailed test - ANS-Is one in which the critical region is in only one end of the
distribution.
Two-tailed test - ANS-Is one that uses both tails of a sampling distribution to determine
the critical region for rejecting the null hypothesis.
Critical region - ANS-Acceptance region on the theoretical distribution, and to accept the
null hypothesis otherwise.
Degrees of freedom - ANS-Is a concept used in statistical testing to indicate the number
of components that are free to vary about a parameter.
One-sample t-test - ANS
Standard error of the difference - ANS-SEd summarizes how much sampling error
occurs, on average, when a mean difference score is computed, for samples of a given
size.
Independent groups t-test - ANS-Is used when the participants in the two groups are not
the same people, nor connected to one another in a systematic way.
Paired t-test - ANS-(Dependent group t test or correlated groups t test)
Point biserial correlation - ANS
Between-group varaiance - ANS-Differences between groups
Within-group variance - ANS-Differences between people in the groups
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 lydiaomutho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79373 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
Recently viewed by you
