Math Problem Statement
The International League of Triple-A minor league baseball consists of 14 teams organized into three divisions: North, South, and West. Suppose the following data show the average attendance for the 14 teams in the International League. Also shown are the teams' records; W denotes the number of games won, L denotes the number of games lost, and PCT is the proportion of games played that were won.
Team NameDivisionWLPCTAttendance
Buffalo Bisons
North
66
77
0.462
8817
Lehigh Valley IronPigs
North
55
89
0.382
8473
Pawtucket Red Sox
North
85
58
0.594
9092
Rochester Red Wings
North
74
70
0.514
6915
Scranton-Wilkes Barre Yankees
North
88
56
0.611
7146
Syracuse Chiefs
North
69
73
0.486
5768
Charlotte Knights
South
63
78
0.447
4523
Durham Bulls
South
74
70
0.514
6993
Norfolk Tides
South
64
78
0.451
6288
Richmond Braves
South
63
78
0.447
4459
Columbus Clippers
West
69
73
0.486
7795
Indianapolis Indians
West
68
76
0.472
8533
Louisville Bats
West
88
56
0.611
9159
Toledo Mud Hens
West
75
69
0.521
8238
Find the value of the test statistic. (Round your answer to two decimal places.)
Find the p-value. (Round your answer to three decimal places.)
p-value =
Solution
To find the value of the test statistic and the corresponding p-value, we need to clarify the context of the hypothesis test being conducted. Given the data provided, the most likely test involves comparing average attendances across the three divisions (North, South, and West). In such a scenario, we would typically conduct a one-way ANOVA test to determine if there is a significant difference in the mean attendance across the divisions.
Steps:
-
Set up the Hypotheses:
- Null Hypothesis (): The mean attendance is the same across the three divisions.
- Alternative Hypothesis (): The mean attendance is different for at least one division.
-
Organize the data by division:
- North Division Attendances: 8817, 8473, 9092, 6915, 7146, 5768
- South Division Attendances: 4523, 6993, 6288, 4459
- West Division Attendances: 7795, 8533, 9159, 8238
-
Conduct ANOVA Test: The ANOVA test will compare the variance between the group means (divisions) and the variance within the groups.
Let's calculate the ANOVA test statistic and the corresponding p-value.
Formula for ANOVA F-statistic:
Where:
- is the variance between the group means.
- is the variance within the groups (based on the individual observations).
Let's compute these values.The value of the test statistic is (rounded to two decimal places).
The corresponding p-value is (rounded to three decimal places).
Since the p-value is less than 0.05, there is evidence to suggest that there is a significant difference in the average attendance between the divisions.
Would you like more details on this test, or help with interpretation?
Here are five related questions:
- What is the next step after rejecting the null hypothesis in ANOVA?
- How do you interpret the results of a post-hoc test like Tukey's HSD after ANOVA?
- What are the assumptions underlying the one-way ANOVA test?
- Can ANOVA handle more than one independent variable? If yes, how?
- What other statistical tests can be used for comparing more than two groups?
Tip: If the p-value is low, it suggests strong evidence against the null hypothesis, meaning the group means are likely different.
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Math Problem Analysis
Mathematical Concepts
Statistics
ANOVA Test
Hypothesis Testing
Formulas
F = MSB / MSW
Mean Square Between Groups (MSB)
Mean Square Within Groups (MSW)
Theorems
One-way ANOVA
Suitable Grade Level
Undergraduate Level (Statistics or Probability courses)
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