For each of the studies below indicate what type of statistic the researcher use
ID: 2909167 • Letter: F
Question
For each of the studies below indicate what type of statistic the researcher used (Pearson correlation, t-test, ANOVA, or chi-square). For t-test or ANOVA, be specific, do not just put t-test or ANOVA, you need to put what type of t-test or ANOVA.
Example 1 ANSWER:
A researcher is interested in the effect of chocolate on mood. The researcher has participants eat three different pieces of chocolate: 1 piece of milk chocolate, 1 piece of dark chocolate, and 1 piece of white chocolate. After each chocolate the participant rates their current mood on a scale from 1 (sad) to 10 (happy). The order in which the participant eats the chocolate is completely counterbalanced and there is a 1-hour delay between each measurement to reduce carry-over effects. The researcher finds that participants were significantly happier after eating dark chocolate than they were after eating either milk or white chocolate, but happiness ratings did not differ between milk and white chocolate.
Example 2 ANSWER:
A researcher is interested in the effects of wearing baseball caps on attractiveness. She randomly assigns half of the participants to view a picture of a person in a baseball cap and the other to the same person not wearing a hat. After the participants viewed the photograph they were asked – is this person attractive (yes/no)? She found that a lower percentage of participants in the no hat condition rated the person as attractive compared to the participants in the baseball cap condition.
Explanation / Answer
Example 1: A onw way ANOVA test is the best fit for this problem.
The one-way analysis of variance (ANOVA) is used to determine whether there are any statistically significant differences between the means of two or more independent groups.
Example 2: chi-square is the best fit for this problem.
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