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# See attachment for complete question. 3 Four experimenters investigated the number of items recalled in a study of short-term memory when comparing

See attachment for complete question.
3 Four experimenters investigated the number of items recalled in a study of short-term memory when comparing some 25 year-old participants (Y) with some 65 year-old participants (O).  (Use a two-tailed test.)  For this question you will be assigned data from one of these experiments on the basis of the first letter of your last name.
If your last name begins with the letters A-E use data from Experiment 1
If your last name begins with the letters F-K use data from Experiment 2
If your last name begins with the letters L-R use data from Experiment 3
If your last name begins with the letters S-Z use data from Experiment 4
Expt 1 Expt 2 Expt 3 Expt 4
Y O Y O Y O Y O
13 9 11 8 12 4 12 5
10 8 10 8 13 10 11 5
11 9 9 4 11 5 9 9
8 6 8 6 7 9 9 7
9 12 9 6 12 9 12 5
13 10 8 8 10 8 9 9
12 8 7 5 14 7 10 8
11 10 7 8 8 9 10 8
Expt 4 is what I am doing
(a) Analyze the data as an independent samples design. On a standard answer sheet, state the null and alternative hypotheses in words, the critical value of t required to reject Ho, for a given value of alpha, and the appropriate degrees of freedom.  Perform the calculations (using calculator or computer), and attach the calculations to the standard answer sheet.  Make the appropriate statistical decisions, and indicate how this would be reported (include means and report effect sizes as r2).  For example, "significantly more items were recalled by younger (mean=10.7) than older (mean=6.2) participants (t(14)=3.8, p
(b) The researchers then realised that they had matched participants on sex and estimated intelligence.  Analyze the same data set as a matched pairs design. On a standard answer sheet state the null and alternative hypotheses in words, the critical value of t required to reject Ho, for a given value of alpha, and the appropriate degrees of freedom.  Perform the calculations (using calculator or computer), and attach the calculations to the standard answer sheet.  Make the appropriate statistical decisions, and indicate how this would be reported (include means and report effect sizes as Cohen's d).  For example, "there were no statistical differences in the numbers of items that were recalled by younger (mean=10.9) than older (mean=9.0) participants (t(7)=2.376, p

3. Four experimenters investigated the number of items recalled in a
study of short-term memory when comparing some 25 year-old participants
(Y) with some 65 year-old participants (O). (Use a two-tailed test.)
For this question you will be assigned data from one of these
experiments on the basis of the first letter of your last name.
If your last name begins with the letters A-E use data from Experiment
1
If your last name begins with the letters F-K use data from Experiment
2
If your last name begins with the letters L-R use data from Experiment
3
If your last name begins with the letters S-Z use data from Experiment
4
Expt 1 Expt 2 Expt 3 Expt 4
Y O Y O Y O Y O
13 9 11 8 12 4 12 5
10 8 10 8 13 10 11 5
11 9 9 4 11 5 9 9
8 6 8 6 7 9 9 7
9 12 9 6 12 9 12 5
13 10 8 8 10 8 9 9
12 8 7 5 14 7 10 8
11 10 7 8 8 9 10 8
Expt 4 is what I am doing
(a) Analyze the data as an independent samples design. On a standard
answer sheet, state the null and alternative hypotheses in words, the
critical value of t required to reject Ho, for a given value of alpha,
and the appropriate degrees of freedom. Perform the calculations (using
calculator or computer), and attach the calculations to the standard
answer sheet. Make the appropriate statistical decisions, and indicate
how this would be reported (include means and report effect sizes as
r2). For example, âsignificantly more items were recalled by younger
(mean=10.7) than older (mean=6.2) participants (t(14)=3.8, p
r2=0.239)â.
(b) The researchers then realised that they had matched participants on
sex and estimated intelligence. Analyze the same data set as a matched
pairs design. On a standard answer sheet state the null and alternative
hypotheses in words, the critical value of t required to reject Ho, for
a given value of alpha, and the appropriate degrees of freedom. Perform
the calculations (using calculator or computer), and attach the
calculations to the standard answer sheet. Make the appropriate
statistical decisions, and indicate how this would be reported (include
means and report effect sizes as Cohen's d). For example, âthere were
no statistical differences in the numbers of items that were recalled by
younger (mean=10.9) than older (mean=9.0) participants (t(7)=2.376,
p

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