Practice Direct Method (5.2.1.2.2.1) - Measures of Central Tendency

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10 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a class interval?
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Think about how scores are categorized.
Question 2.
How do you calculate the mid value of a class interval?
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What is the formula for finding an average?
3Question 3.
What is the purpose of the Direct Method?
- To find the median
- To compute average marks
- To categorize data
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Consider what we're trying to achieve with grouped data.
4Question 4.
The mid value is found by which of the following?
- True
- False
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Think back to how we computed mid values.
Question 5.
A class of 80 students scored between 0 to 70. Class intervals are 0-10, 10-20 up to 60-70 with respective frequencies. Calculate the average using the Direct Method.
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Don't forget to sum your mid values multiplied by frequencies.
Question 6.
Discuss how you would approach analyzing a dataset with several outliers. How would this affect your average?
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Use examples to illustrate how averages can be affected by extreme values.

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