hw6 - complex language usage than children who do not....

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Homework 6 11 points You can use SPSS or the calculation tool on IntroStats to obtain any information (mean, SD, etc.) you may need. However, please attach any output you obtain from SPSS or write down any values you calculate from IntroStats to get full credit. Problems from Howell : None Problems from Williams (Introstats.net): Ch 10: 1, 4 (2 points each) 1. Find df between , df within , and df total for each of the following: (1 point each) a. An experiment with 4 groups of 10 participants each b. An experiment with 10 groups of 4 participants each c. An observational study with 3 groups, 20 participants in each group 2. List the reasons why a one-way ANOVA may be a better choice than a t -test. (1 point) 3. Researchers in speech development have found that children who stutter show less
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Unformatted text preview: complex language usage than children who do not. However, numerous treatments to help children overcome stuttering have been proposed. In one study, complexity in spontaneous speech was measured for children randomized into one of three treatment groups. Some children learned about lowering their anxiety before speaking (anxiety reduction group). Others spent time in individual practice with long sentences (individual practice). The control group received no treatment. There were 5 children in each group. The data are: a. What are the null and alternative hypotheses? (1 point) b. What are the between, within, and total degrees of freedom? (1 point) c. The researcher reports an observed F value of 3.4. Do you believe this? Why or why not? (1 point)...
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