PSYC 2005- EXAM 1 Questions With 100% Verified Correct Answers.
3 views 0 purchase
Course
PSYC 2005
Institution
PSYC 2005
central tendency - correct answer typical or most representative value of a group of scores
outlier - correct answer score with an extreme value (very high or very low) in relation to the other scores in the distribution
...
-situation in which many scores pile up at the high end of a distribution (creating skewness to the left)
because it is not possible to have a higher score
floor effect - correct answer -positively skewed
,-situation in which many scores pile up at the low end of a distribution (creating skewness to the right)
because it is not possible to have any lower score
normal curve - correct answer
variance - correct answer measure of how spread out a set of scores are; average of
the squared deviations from the mean
standard deviation - correct answer -square root of the average of the squared
deviations from the mean
-the most common descriptive statistic for variation
-approximately the average amount that scores in a distribution vary from the mean
hypothesis testing - correct answer procedure for deciding whether the outcome of
a study (the results) supports a particular theory or practical innovation
hypothesis - correct answer prediction, often based on informal observation,
previous research, or theory, that is tested in a research study
theory - correct answer set of principles that attempt to explain one or more facts,
relationships, or events; psychologists often derive specific predictions from theories that are then
tested in research studies
research hypothesis - correct answer statement in hypothesis testing about the
predicted relation between populations
-prediction of a difference of between population means
null hypothesis - correct answer -statement about a relation between populations
that is opposite of the research hypothesis
-statement that in the population there is no difference between populations
comparison distribution - correct answer distribution used in hypothesis testing
, -represents the population situation if the null hypothesis is true
-distribution into which you compare the score based on the sample's results
cutoff sample score (critical value) - correct answer point in hypothesis testing on
the comparison distribution, where if it's reached or exceeded by the sample score, you reject the null
hypothesis
statistically significant - correct answer conclusion that the results of a study would
be unlikely if in the sample studied represents a population that is no different from the population in
general
-null hypothesis is rejected
directional hypothesis - correct answer research hypothesis predicting a particular
direction of difference between populations
one-tailed test - correct answer hypothesis-testing procedure for a directional
hypothesis
-the region of the comparison distribution in which the null hypothesis would be rejected is all on one
side of the distribution
nondirectional hypothesis - correct answer research hypothesis that does not
predict a particular direction of difference between the population like the sample studied and the
population in general
two-tailed test - correct answer hypothesis--testing procedure for a nondirectional
hypothesis
-region of the comparison distribution in which the null hypothesis would be rejected is divided between
the two sides of the distribution
decision errors - correct answer incorrect conclusions in hypothesis testing in
relation to the real (but unknown) situation, such as deciding the null hypothesis is false when it is really
true
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 RealGrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
