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2015/2016

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STAT 3604: ANOVA Assignment
The Thanksgiving_2015_poll_data.jmp data set (linked in this
assignment) contains survey data about Thanksgiving traditions in the
US. You will use these data to answer the following:
Is there a significant difference in average age among those
who travel various distances (or don’t travel at all) to
celebrate Thanksgiving?
NOTE: You will use the variables ‘How far will you travel for
Thanksgiving’ and ‘Age’ to answer this question.
1. Produce a side-by-side boxplot to display average Age among
the 4 groups who answered ‘How far will you travel for
Thanksgiving’. This display should be well formatted in the
ways we have formatted previous displays. Copy and paste the
display here. (0.5 points)
2. What are the appropriate null and alternate hypotheses to be
tested? Please use the correct format as noted in the course
materials. (0.25 points)
H0: “no difference in age”
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STAT 3604: ANOVA Assignment The Thanksgiving_2015_poll_data.jmp data set (linked in this assignment) contains survey data about Thanksgiving traditions in the US. You will use these data to answer the following: Is there a significant difference in average age among those who travel various distances (or don’t travel at all) to celebrate Thanksgiving? NOTE: You will use the variables ‘How far will you travel for Thanksgiving’ and ‘Age’ to answer this question.

  1. Produce a side-by-side boxplot to display average Age among the 4 groups who answered ‘How far will you travel for Thanksgiving’. This display should be well formatted in the ways we have formatted previous displays. Copy and paste the display here. (0.5 points)
  2. What are the appropriate null and alternate hypotheses to be tested? Please use the correct format as noted in the course materials. (0.25 points) H0: “no difference in age”

HA: “there is a difference in age”

  1. Conduct an ANOVA test in JMP to answer this research question. Copy and paste the appropriate output from JMP indicating the results of the ANOVA test. This should include the F statistic and the associated p-value. (0.5 points) Analysis of Variance Source DF Sum of Squares Mean Square F Ratio Prob > F How far will you travel for Thanksgiving? 3 4207.87 1402.62 4.1890 0.0059* Error 943 315747.19 334. C. Total 946 319955. Means for Oneway Anova Level Number Mean Std Error Lower 95% Thanksgiving is happening at my home--I won't travel at all 394 50.2259 0.9219 48. Thanksgiving is local--it will take place in the town I live in 275 46.9927 1.1034 44. Thanksgiving is out of town and far away--I have to drive several hours or fly 82 46.9268 2.0207 42. Thanksgiving is out of town but not too far--it's a drive of a few hours or less 196 44.8929 1.3070 42. Std Error uses a pooled estimate of error variance
  2. What is the p-value for this test? (0.25 points) .
  3. Based on the correct p-value, what is the correct rejection decision? (0.25 points) Reject the null hypothesis because it lower than.
  4. Is it necessary to conduct a Tukey’s HSD post hoc test? Why or why not? (0.25 points) Yes, we rejected the null hypothesis
  5. Using 1-2 full sentences, provide an appropriate answer to the research question above. If you conducted a Tukey’s HSD post hoc test, include what you learned from that test in your conclusion. (1 point) The Turkey’s HSD post hoc test concluded that the largest data difference was between the “I don’t travel at all” category and “I will travel a few hours or less”. It shows there is a significant difference between ages of people that will travel for Thanksgiving.