Question

1. A researcher compared the effects of three different instructional techniques to a control condition and each other (k=4). She tested students' ability to do statistics problems. For each condition, she tested four students. The results are summarized below (Note: SST is provided to use as a check, do not use it to calculate either SSB, or SSW): CC IT1 IT2 IT3 T?=20 T?=32 T?=20 T?=8 SS?=12 SS?=14 SS?=12 SS?=10 SST=120 Run a complete hypothesis test, with ? = .05, to determine if there were any reliable differences between the treatment groups. Do the results show that technique 1 is better than technique 2? Explain your answer. If she had done a t-test instead, what t and df would she have found? 2. The following SPSS tables summarize the results of a two-factor ANOVA evaluating an independent-measures experiment with three levels of Herbal Treatment crossed with two levels of Patient Attitude. Do hypothesis tests, with ? = .05, for main effects and interactions. Summarize the results in a matrix table, including row, and column means. Then, summarize the results in a graph to illustrate whether or not there is an interaction. Describe any main effects and interactions that were found.

          1. A researcher compared the effects of three different instructional techniques to
a control condition and each other (k=4). She tested students' ability to do
statistics problems. For each condition, she tested four students. The results
are summarized below (Note: SST is provided to use as a check, do not use it to
calculate either SSB, or SSW):
CC
IT1
IT2
IT3
T?=20
T?=32
T?=20
T?=8
SS?=12
SS?=14
SS?=12
SS?=10
SST=120
Run a complete hypothesis test, with ? = .05, to determine if there were any
reliable differences between the treatment groups. Do the results show that
technique 1 is better than technique 2? Explain your answer. If she had done
a t-test instead, what t and df would she have found?
2. The following SPSS tables summarize the results of a two-factor ANOVA
evaluating an independent-measures experiment with three levels of Herbal
Treatment crossed with two levels of Patient Attitude. Do hypothesis tests,
with ? = .05, for main effects and interactions. Summarize the results in a
matrix table, including row, and column means. Then, summarize the results
in a graph to illustrate whether or not there is an interaction. Describe any
main effects and interactions that were found.

1. A researcher compared the effects of three different instructional techniques to
a control condition and each other (k=4). She tested students' ability to do
statistics problems. For each condition, she tested four students. The results
are summarized below (Note: SST is provided to use as a check, do not use it to
calculate either SSB, or SSW):
CC
IT1
IT2
IT3
T?=20
T?=32
T?=20
T?=8
SS?=12
SS?=14
SS?=12
SS?=10
SST=120
Run a complete hypothesis test, with ? = .05, to determine if there were any
reliable differences between the treatment groups. Do the results show that
technique 1 is better than technique 2? Explain your answer. If she had done
a t-test instead, what t and df would she have found?
2. The following SPSS tables summarize the results of a two-factor ANOVA
evaluating an independent-measures experiment with three levels of Herbal
Treatment crossed with two levels of Patient Attitude. Do hypothesis tests,
with ? = .05, for main effects and interactions. Summarize the results in a
matrix table, including row, and column means. Then, summarize the results
in a graph to illustrate whether or not there is an interaction. Describe any
main effects and interactions that were found.

Added by Carmen C.

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