PSYC 354
HOMEWORK 4
Sampling and Probability
When submitting this file, be sure the filename includes your full name, course and section.
Example: HW4_JohnDoe_354B01
Be sure you have reviewed this module/week’s lesson and presentations along with the practice
data analysis before proceeding to the homework exercises. Complete all analyses in SPSS, then
copy and paste your output and graphs into your homework document file. Answer any written
questions (such as the text-based questions or the APA Participants section) in the appropriate
place within the same file.
Part I: Concepts
Questions 1–15
These questions are based on the Nolan and Heinzen reading and
end-of-chapter questions.
Questions 1-10
Fill in the highlighted blanks to answer/complete the statements.
1)
Define an “illusory correlation” and give a brief example. _the phenomenon of
believing one sees an association between variables when no such association
exists.
i.e. a sports fan associates his team winning with him watching the game while
wearing his lucky socks______.
2) Generalizability_______ refers to researchers’ ability to apply findings from one
sample or in one context to other samples or contexts.
3) The duplication of the results of a research study in a different context or with a
different sample is called replica_replication_______.
4) Your own estimate of the likelihood that you will win a contest is known as a(n)
_personal probability_______.
5) Expected relative-frequency probability is computed as the number of
_successes_______ _trials_______ divided by the number of .
6)
According to the Nolan and Heinzen (2016) text, what is the difference between a
random sample and a convenience sample? _Random sample: every member of
the population has an equal chance of being selected for the study;
Convenience sample: the participants are chosen from a group of people who
are readily available_______.
7) A statement that 2 populations are different from one another is a(n)
_research_______ hypothesis.
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PSYC 354
8) If you find that the groups you studied differed from each other more than would be
expected by chance alone, you the null hypothesis._reject_______
9) When you reject the null hypothesis but the null hypothesis is in fact true, you have
made a(n) __Type I______ error.
10) When you fail to reject the null hypothesis but the null hypothesis is in fact false,
you have made a(n) __Type II______ error.
Question 11a-11b
Researchers were interested in whether toddlers with older siblings learn to read at a different
rate than those without older siblings. They recruited a sample of families and compared the
