stat hw 6 - 4.1 a) An observational study because they...

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4.1 a) An observational study because they simply need to question or observe the participants in their normal activities, rather than get them to change how they study. b) A randomized experiment because the researches need to manipulate the participants by giving them different medications they normally wouldn’t take. c) Randomized because they need to have the participants change their behavior as they’re randomly assigned to introduce themselves by name. 12.8 a) Null, because it claims there is no difference. b) Alternative, because it claims there is a difference. c) Alternative, because it claims there is a relationship. 12.13 null: P will not be higher than the present success rate. Alternative: P will be greater than the present success rate of 65%. 12.24 a) Parameter of interest is the proportion of artists in the sample that are left-handed. Null value =. 10 b) Null: There is no relationship between being an artist and handedness. Alternative: Artists are more likely to be left-handed than are other people in the general
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stat hw 6 - 4.1 a) An observational study because they...

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