T Test Jeopardy

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T Test Jeopardy
Name that Statistical Test
Lets do research!
Fun with SPSS
Right or Wrong?
Hodgepodge
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Final Jeopardy
2
FINAL JEOPARDY

• ANSWER In SPSS, this number represents the exact
  probability of obtaining the result you did
  merely by chance (AKA if the H0 is assumed to be
  true)
• QUESTION What is the significance level or
  p-value reported under the column Sig.(2-tailed)
  in SPSS?

3
Name that Statistical Test100

• ANSWER An instructor tries a new method of
  teaching statistics using humor in one section
  and the old method in another. This is the type
  of research design she is using, and this is the
  type of t test she would do to evaluate her
  research question.
• QUESTION What is a between-subjects design and
  an independent-samples t test?

4
Name that Statistical Test 200

• ANSWER A researcher wants to know if his
  samples political orietation (rated by Ps on a
  9-point Likert scale from very conservative to
  very liberal) is significantly different from
  moderate (5 on the scale).
• QUESTION What is a single-group design and a
  one-sample t test?

5
Name that Statistical Test300

• ANSWER A clinical psychologist compares her
  clients general level of functioning (assessed by
  the Global Assessment of Functioning GAF scale
  Axis V of the DSM-IV-TR, 2000) before therapy and
  then again after 10 sessions.
• QUESTION What is a repeated measures design and
  a paired-samples t test?

6
Name that Statistical Test400

• ANSWER A cognitive psychologist compares memory
  for nonsense syllables for participants who are
  either instructed in the use of a mnemonic
  strategy or who are not given any strategy. He is
  only interested in if the mnemonic strategy
  improves memory.
• QUESTION What is a between-subjects design and a
  one-tailed independent-samples t test?

7
Name that Statistical Test500

• ANSWER A school psychologist matches students
  who are similar to one another on math ability
  and then assess performance of the two groups of
  students after one group participates in a
  special math program.
• QUESTION What is a matched-samples research
  design and a paired-samples t test?

8
Lets do research!100

• ANSWER You find a significant result, but your
  not sure whether the difference is big enough to
  be important so you decide to calculate this.
• QUESTION What is effect size or Cohens d?

9
Lets do research!200

• ANSWER A friend of your in methods calculates
  Cohens d and gets a result of d 2.75. He is
  not sure what this means, so this is how you tell
  him to interpret it.
• QUESTION What is Holy shit!! Thats a huge
  effect!!?

10
Lets do research!300

• ANSWER This is when calculating Cohens d is
  appropriate.
• QUESTION What is when you are doing a
  paired-samples or independent-samples t test, and
  the difference is significant?

11
Lets do research!400

• ANSWER Oh no, Levenes test is significant!!
  This is what it means, and this is what I should
  do now.
• QUESTION What is conclude that the homogeneity
  of variance assumption for the independent-samples
  t test is violated and report t value and p
  value for the second row (equal variances not
  assumed)?

12
Lets do research!500

• ANSWER In APA style, you should always report
  all of these things.
• QUESTION What are means, standard deviations,
  degrees of freedom, obtained t value, p value,
  and Cohens d when appropriate?

13
Fun with SPSS100

• ANSWER In SPSS, the probability that you would
  use to evaluate significance when a .01, and
  you are performing a one-tailed test.
• QUESTION What is .01 2 .02?

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Fun with SPSS200

• ANSWER In a one-sample t test, the confidence
  interval for these data.
• QUESTION What is CI .77 µ 1.17?

15
Fun with SPSS300

• ANSWER In an independent-samples t test, the row
  from which you report results when Levines test
  is not significant.
• QUESTION What is equal variances assumed?

16
Fun with SPSS400

• ANSWER In an independent-samples t test, the
  confidence interval for the SPSS output reported
  above.
• QUESTION What is CI .33 µ 3.98?

17
Fun with SPSS500

• ANSWER The conclusion a researcher would draw
  from these data.
• QUESTION What is retain H0 and conclude there is
  no significant difference between students who
  prefer morning and afternoon classes?

18
Right or Wrong?100

• ANSWER The type of error that occurs when I fail
  to reject a false null hypothesis.
• QUESTION What is Type II error?

19
Right or Wrong?200

• ANSWER The type of error that occurs when I
  reject a true null hypothesis.
• QUESTION Type I error?

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Right or Wrong?300

• ANSWER The more of this you have, the more
  likely it is that you will make a correct
  decision about the null hypothesis.
• QUESTION What is power?

21
Right or Wrong?400

• ANSWER As the probability of Type II error
  decreases, this simultaneously increases.
• QUESTION What is power?

22
Right or Wrong?500

• ANSWER When you increase a, the good news is
  that the probability of this kind of mistake goes
  down, but this comes at a price because the
  probability of this other kind of mistake
  simultaneously increases.
• QUESTION What is Type II error and Type I error?

23
Hodgepodge100

• ANSWER The only circumstance under which using a
  one-tailed test is appropriate.
• QUESTION What is when an outcome opposite to
  that you are predicting means exactly the same
  thing to you as finding theres no difference?

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Hodgepodge200

• ANSWER In the independent-samples t test, the
  assumption that the variances in the two
  populations you are comparing are equal.
• QUESTION What is the homogeneity of variance
  assumption?

25
Hodgepodge300

• ANSWER Increasing sample size decreases this,
  which then increases this.
• QUESTION What is the standard error of the
  estimate and power?

26
Hodgepodge400

• ANSWER In an independent-samples t test, the
  null and alternative hypotheses when Im
  predicting that anxiety patients who get therapy
  will have less anxiety than those that dont.
• QUESTION What is H0 µtherapy - µno therapy 0
  and HA µtherapy - µno therapy lt 0?

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Hodgepodge500

• ANSWER In an independent-samples t test, this is
  the null hypothesis that Levines test evaluates.
• QUESTION What is the null hypothesis that the
  variance in the two samples being compared are
  equal?