Flashcards on Calculating the Mean of Ungrouped Data
Calculating the Mean of Ungrouped Data: A Simple Guide
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Descriptive Statistics (Ungrouped Data)
10 cards
Card 1
Question: What is 'data' in statistics as described here?
Answer: A collection of elements or observations, such as marks of learners or distances run daily by an athlete.
Card 2
Question: In the example, what does each mark represent?
Answer: Each mark is an element or observation in the data set.
Card 3
Question: What does 'n' represent in a data set?
Answer: The number of elements in the data; also called the sample size or sample space.
Card 4
Question: What is the sample size for Mrs Anna's class of learners who wrote the test?
Answer: n = 23, because 23 marks were recorded.
Card 5
Question: What is ungrouped data?
Answer: Raw data that is not recorded in groups or intervals.
Card 6
Question: Why is Mrs Anna's data considered ungrouped?
Answer: Because the marks are recorded individually and not grouped into intervals.
Card 7
Question: State one advantage of having ungrouped data mentioned in the content.
Answer: We can calculate its exact mean.
Card 8
Question: What is the mean (x̄) in descriptive statistics?
Answer: The average of all the elements in the data.
Card 9
Question: Give the formula for the mean of ungrouped data.
Answer: x̄ = (Σ_{i=1}^n x_i) / n, where x_i is the ith element and n is the sample size.
Card 10
Question: How do you calculate the mean for ungrouped data in words?
Answer: Add all the elements in the data and divide by the number of elements (n).