Statistics Home work.

Feb 3rd, 2012
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A student is interested in whether students who study with music playing devote as much attention to their studies as do students who study under quiet conditions (he believes that studying under quiet conditions leads to better attention). He randomly assigns participants to either the music or no-music condition and has them read and study the same passage of information for the same amount of time. Participants are then all given the same 10-item test on the material. Their scores appear next. Scores on the test represent interval-ratio data and are normally distributed.

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A student is interested in whether students who study with music playing devote as much attention to their studies as do students who study under quiet conditions (he believes that studying under quiet conditions leads to better attention). He randomly assigns participants to either the music or no-music condition and has them read and study the same passage of information for the same amount of time. Participants are then all given the same 10-item test on the material. Their scores appear next. Scores on the test represent interval-ratio data and are normally distributed.The researcher conduct the same study (above) using a within-participants design to control for differences in cognitive ability. He selects a random sample of participants and has them study different material of equal difficulty in both the music and no-music conditions. The study is completely counterbalanced to c

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