Podcast
Questions and Answers
Calculate the variance for Group A. Round to the nearest tenth.
Calculate the variance for Group A. Round to the nearest tenth.
- 187.5 (correct)
- 233.3
- 200.0
- 120.0
Calculate the standard deviation for Group B. Round to the nearest tenth.
Calculate the standard deviation for Group B. Round to the nearest tenth.
- 9.2
- 6.7 (correct)
- 5.0
- 4.5
Which group has the higher variance?
Which group has the higher variance?
- Not enough information to determine
- Group B
- Group A (correct)
- Both groups have the same variance
Which group is more variable?
Which group is more variable?
Can we determine significance based on the calculated variance and standard deviation in the provided data?
Can we determine significance based on the calculated variance and standard deviation in the provided data?
Flashcards
Variance
Variance
A measure of how much scores differ from the mean.
Standard Deviation
Standard Deviation
The square root of variance, indicating dispersion of scores.
Group A Scores
Group A Scores
A set of scores with values: 10, 40, 30, 15, 30.
Group B Scores
Group B Scores
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More Variable Group
More Variable Group
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Study Notes
Variance Practice Question
- Topic: Variance calculation and comparison of data sets
- Instruction: Calculate variance and standard deviation for Group A and Group B
- Data: Group A scores: 10, 40, 30, 15, 30; Group B scores: 10, 20, 15, 25, 30
- Question: Which group (A or B) is more variable? Can significance be determined?
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