hw6 - has something to do with it You plant 10 tomato...

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Homework #6 Psychology 320 Prof. Van Zandt Due: 05/26/05 Because the solutions will be posted, no late homework will be accepted. Clearly label your work. Staple multiple pages. Complete the following exercises from the Howell text: 8.2 8.4 page160 Complete the following exercises from the Williams website: 5.1 5.5 5.8 Use SPSS to find confidence intervals around Y, X1, and X2 (Howell, exercise 9.12, page 200). Attach the printouts. Answer the questions: You are a Martian scientist trying to discover what makes plants grow. You suspect water
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Unformatted text preview: has something to do with it. You plant 10 tomato plants, and give them no water at all. All other factors are controlled. You know from your previous work that tomato plants typically yield 3 pounds of tomatoes. You set your alpha level at .05. • What is the null hypothesis? • If the null hypothesis were true, about how many times out of 100 would you reject it? • We know that the null hypothesis is false. Given that knowledge, if you were to run this experiment 100 times, how often would you find a difference between the groups?...
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