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this is another one I can not seem to correct

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7. [-/11 Points]
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PRIVITERASTATS3 12.E.025.
MY NOTES
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Iconic memory is a type of memory that holds visual information for about half a second (0.5 seconds). To demonstrate this type of
memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as
possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer
recall. The number of letters correctly recalled is given in the table.
Delay Before Recall
0
0.5
5
7
2
10
10
8
6
8
4
8
4
1
10
3
4
9
4
15
(a) Complete the F-table. (Round your values for MS and F to two decimal places.)
Source of Variation
SS
df
MS
F
Between groups
Within groups (error)
Total
(b) Compute Tukey's HSD post hoc test and interpret the results. (Assume alpha equal to 0.05. Round your answer to two
decimal places.)
The critical value is
for each pairwise comparison.
Which of the comparisons had significant differences? (Select all that apply.)
O Recall following no delay was significantly different from recall following a half second delay.
Recall following no delay was significantly different from recall following a one second delay.
O The null hypothesis of no difference should be retained because none of the pairwise comparisons demonstrate a
significant difference.
Recall following a half second delay was significantly different from recall following a one second delay.
You may need to use the appropriate table in Appendix C to answer this question.
Additional Materials
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