An experiment was conducted to examine the performance (as measured by the number of errors made) on a motor skills task. Twenty-four subjects (12 young and 12 old) were assigned to either an easy or hard motor skills task. There were two factors in the study: age (young/old) and difficulty of the motor skills task (easy/hard). The number of errors made on the motor skills task was recorded for each person and is presented in the table below. (We do not need to use a test of equal variances). Difficulty Easy Hard Age Young 7 4 3 5 4 6 7 6
An experiment was conducted to examine the performance (as measured by the number of errors made) on a motor skills task. Twenty-four subjects (12 young and 12 old) were assigned to either an easy or hard motor skills task. There were two factors in the study: age (young/old) and difficulty of the motor skills task (easy/hard). The number of errors made on the motor skills task was recorded for each person and is presented in the table below. (We do not need to use a test of equal variances).
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Difficulty |
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Easy |
Hard |
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Age |
Young |
7 4 3 5 4 6 |
7 6 8 9 8 7 |
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Age |
Old |
6 7 6 5 3 8 |
10 11 14 13 12 14 |
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State the null and alternative hypotheses
Report the results of the hypothesis tests in #a below. Be sure to express the results in the context of the study and use APA format as appropriate. Sketch, label, and describe any significant interaction(s). (For your sketch, make it look like the plot shown in SPSS.) Use α = .05 for each test
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