STAT 509 Assignment# 6

| May 19, 2015

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Assignment: (Show your work)

  1. Use the ANOVA table below to answer the following questions:
  • How many groups are being compared? (1 point)

 

  • What is the F critical value at an alpha of 0.05? (1 point)

 

 

  • What is the F-value? (1 point)

 

 

  • What is your decision in comparing the group means? (1 point)

 

 

 

 

 

Source Sum of Squares Degrees of freedom Mean of squares     F-value
Between group variation 103.3 2
Within group variation 72.0 12
  1. Three samples were selected from three different populations. Use the information shown below to answer the following questions:

 

 

 

  • What is the overall mean (grand mean) for all the groups? (2 points)

 

 

 

 

 

  • What is the critical F value? (1 point)

 

 

 

  • At α=0.05, can one conclude that there is a significant difference in the means. Use the test statistics method to answer this question. (3 points)

 

 

 

 

 

 

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statistics for the behavioral and social sciences
Statistic question

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Category: Statistics

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