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When the null hypothesis is rejected, we would expect the variance ratio to be:

A psychologist would like to examine the relative effectiveness of three different therapy techniques for the treatment of mild phobias. A sample of 15 individuals who display moderate fear of spiders were recruited to participate in the study. These individuals were then randomly assigned (n = 5) to one of the three different therapies. After six weeks of therapy each participant’s fear of spiders was evaluated, scores ranged from 1 to 5 (1 = no fear, 2 = some fear, 3 = neutral, 4 = afraid, 5 = extremely afraid). Use the data below to determine if the three therapies differed in how effectively they treated the participant’s fear of spiders. **Report the observed value of F to 4 decimal places. Fear of Spiders Ratings for the Three Groups Therapy A Therapy B Therapy C 5 4 3 5 3 1 5 2 1 4 4 1 4 2 3

A psychologist would like to examine the relative effectiveness of three different therapy techniques for the treatment of mild phobias. A sample of 15 individuals who display moderate fear of spiders were recruited to participate in the study. These individuals were then randomly assigned (n = 5) to one of the three different therapies. After six weeks of therapy each participant’s fear of spiders was evaluated, scores ranged from 1 to 5 (1 = no fear, 2 = some fear, 3 = neutral, 4 = afraid, 5 = extremely afraid). Use the data below to determine if the three therapies differed in how effectively they treated the participant’s fear of spiders. **Report the observed value of F to 4 decimal places. Fear of Spiders Ratings for the Three Groups Therapy A Therapy B Therapy C 5 2 2 4 3 2 4 2 3 3 4 2 4 3 2

An investigator studied the relationship between marital status and attitudes towards same-sex marriage. Thirty people that identified as heterosexual were interviewed for the study. 10 participants were single, 10 were married, and 10 were divorced. An attitude questionnaire was then administered to each participant in order to measure their attitude towards same-sex marriage. The scale ranged from 1 to 12 with higher scores representing a more positive attitude towards same-sex marriage. What is the critical value for this problem?

_____ is not influenced by the effect of the independent variable on the dependent variable.

Suppose a researcher runs a one-way between-subjects ANOVA and finds the following Source    SS       df        MS           F            Between  50      2        25           7.5001 Within      60    18       3.3333                        Total         110           Use the information to calculate eta-squared. **Report your answer as a proportion out to 4 decimal places.

A psychologist would like to examine the relative effectiveness of three different therapy techniques for the treatment of mild phobias. A sample of 15 individuals who display moderate fear of spiders were recruited to participate in the study. These individuals were then randomly assigned (n = 5) to one of the three different therapies. After six weeks of therapy each participant’s fear of spiders was evaluated, scores ranged from 1 to 5 (1 = no fear, 2 = some fear, 3 = neutral, 4 = afraid, 5 = extremely afraid). Use the data below to determine if the three therapies differed in how effectively they treated the participant’s fear of spiders. **Report the observed value of F to 4 decimal places. Fear of Spiders Ratings for the Three Groups Therapy A Therapy B Therapy C 5 4 1 4 3 2 5 3 3 4 3 2 4 2 2

When calculating the Tukey test, if the absolute difference exceeds the _____, then reject the null hypothesis.

In a one-way ANOVA within groups variability include(s)_________.

Suppose a researcher runs a one-way between-subjects ANOVA and reports the following:  . Based on this information how many groups were compared in the study?